President Trump speaks at Shale Insight Conference in Pittsburgh

PITTSBURGH (AP) — President Donald Trump promoted his support for the natural gas industry Wednesday, making clear on his second visit to Pennsylvania in the past three months that he sees his pro-industry policies as a boost to his chances of winning the battleground state in 2020.

As some of his leading Democratic opponents call for a fracking ban, Trump has been eager to cut a contrast, touting his support for a sector he says brings economic benefits to rural pockets and jobs to construction union workers.

But pipeline politics might not be so clear-cut.

In the suburbs that might be key to his path to victory, Pennsylvania voters have shown a growing opposition to the drilling and massive pipelines required to move its product across the state. Candidates in state and local races are increasingly hardening their stances on the industry. National polling shows growing skepticism of fracking, the process used in extraction.

While the issue is unlikely to be the one that turns a race already dominated by Trump's strong personality, a looming impeachment fight and accusations of racism, Trump's eagerness to promote the industry underscores his tight focus on shoring up his base of rural voters, even at the risk of alienating others.

"Today, I'm proud to declare that I've delivered on every single promise I made to this conference three years ago and much, much more," Trump said at an energy conference in Pittsburgh, a corporate hub of activity in the Marcellus Shale, the nation's most prolific natural gas reservoir.

Trump reminded the audience that he overturned the Clean Power Plan, put forward by his predecessor, former President Barack Obama, to fight climate change.

"Sounds nice but it wasn't nice," Trump, a climate change skeptic, said of the plan. "It was a disaster."

The president also highlighted his decision to pull the U.S. out of the Paris climate agreement, a multinational pact designed to reduce the emission of gases that contribute to global warming.

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Trump has argued that the agreement entered into during the Obama years would have restricted the U.S. but allowed foreign producers to "pollute with impunity."

"My job is to represent the people of Pittsburgh, not the people of Paris," the president said as the audience cheered.

Addressing the Pittsburgh conference gave Trump the ability to pitch to an industry and a region — western Pennsylvania, eastern Ohio and West Virginia — that help make up "what some would call his base," said Dave Spigelmyer, president of the Marcellus Shale Coalition, a trade group that's co-sponsoring the event.

"The president certainly recognizes what a critical role this country is playing in energy, and that this state and region are playing in energy," Spigelmyer said.

Several Democratic presidential candidates are taking their own political risks on the issue. Backed by environmentalists on the left, some candidates— including Bernie Sanders and Elizabeth Warren — have broken from the party's past support for fracking to call for a nationwide ban. More centrist candidates, including former Vice President Joe Biden, have declined to go that far.

Trump's visit Wednesday followed an August rally at a massive ethane refinery being built northwest of Pittsburgh.

"This would have never happened without me and us," Trump said.

In 2016, Trump eked out a win in Pennsylvania — the first Republican presidential candidate to capture it since 1988 — by piling up support with Pennsylvania's rural areas and working-class whites.

Philadelphia's moderate suburbs, meanwhile, turned decisively against him. Some party officials have fretted that Trump will need to improve his suburban performance in 2020 to win Pennsylvania a second time.

The 350-mile (560-kilometer) Mariner East pipeline route traverses those suburbs, close to schools, ballfields and senior care facilities. The spread of drilling, compressor stations and pipelines has changed neighborhoods — and opinions.

"It's absolutely traumatic and I don't say that to exaggerate or cry wolf," said Carrie Gross, referring to the project that runs through backyards in her middle-class Philadelphia suburb of Uwchlan Township. "It's devastated my neighborhood."

Houses in the area there were built some 30 years after workers laid an oil pipeline to carry oil from a Philadelphia-area refinery. Now, the pipeline and others laid along the same route carry highly volatile natural gas liquids — ethane, butane and propane — from western Pennsylvania's drilling fields to the renovated refinery, much of it for export to Europe.

The project has drawn more than $13 million in fines — primarily for polluting waterways from spills of drilling fluid and construction methods not approved by state regulators — and several temporary shutdown orders by state agencies.

Neighbors worry that a single leak would level the entire neighborhood. Warning signs stand perhaps 100 feet (30 meters) from a "Watch Children" sign, and the sound of clanging echoes throughout the neighborhood.

Industry officials embrace Trump as someone who understands the importance of natural gas to the nation's economy, consumers and national security, and Trump's administration has undoubtedly been good for the industry.

His appointees have moved to relax methane pollution standards, expand extraction on federal lands, boost the export of liquefied natural gas and restrict the ability of states to use federal permitting authority to block pipelines.

The industry has strong allies in organized labor that have seen a huge influx of work across the state while the plentiful fuel is heating more homes and feeding more power plants.

Still, an Associated Press-NORC poll in August found only 22% of Americans support increasing fracking while 45% oppose it. In 2014, just 31% registered opposition.

The number of Democrats in the state Legislature who oppose fracking is growing, and Democrats who dominate statewide offices have used the industry as a punching bag.

Once a registered Republican, Gross says her experience with Mariner East has transformed her worldview.

The 37-year-old now backs candidates with the strongest stance on the climate. She voted for Democrat Hillary Clinton in 2016, the first time she strayed from a Republican presidential candidate, although she didn't feel strongly about that decision, she said.

She does now.

"Bernie's probably the best because he's anti-fracking," Gross said. "And Elizabeth Warren has come out in support, so she's probably second."

Other residents in the neighborhood are not necessarily as resolute as Gross. Some who live a stone's throw from the pipeline say it hasn't affected them. Some said that it had changed their political views, albeit in subtler ways, or that it might in the future.

Some said they felt abandoned by both Democrats and Republicans.

Peduto released the following statement on clean energy and the Paris Climate Agreement:

"President Trump's remarks on energy and the Paris Agreement today underscore why the 2020 election is so important, not only for the United States but for the world.

The United States cannot officially withdraw from the Paris Agreement until November 2020, so final action will rightly be made by the next President. Pittsburgh adopted the Agreement in 2017, and is one of 400 American cities that has done so to fight the climate crisis.

His statements about energy are wrong, and stuck in an outdated 19th Century mindset. The Pittsburgh region is thriving and has moved on to a 21st Century economy based on technology and clean energy production. President Trump's outdated vision for Western Pennsylvania and the Rust Belt would put the final nails into the coffin of those struggling communities his economy has left behind.

These are the facts:

In Pennsylvania there are twice as many workers employed by the clean energy industry than by fossil fuel producers. There are more clean energy workers in Allegheny County than any other county in the state, including Philadelphia. The plans the City of Pittsburgh has adopted to cut carbon emissions in half are projected to add 110,000 full-time equivalent jobs by 2030. Pittsburgh has transiti oned  to a technology-based economy, with its tech firms attracting almost $4 billion in investments the last 10 years – $2.3 billion of which has come in just the last five years, much of it focused on the autonomous vehicle and robotics sectors.

Pittsburgh has willed itself into economic rebirth after its near death. It joins the world in valuing our future over reliving the past."

The conference is branded as the premiere location to network with industry leaders, elected officials and others who "play a critical role" in making the laws and technology to develop shale gas around the world.

There will be technical and public affairs sessions, networking events, sponsors, exhibitors and a number of speakers in addition to President Trump.

Local university officials, including from Penn State and WVU, are also playing a part in the event showcasing their research and studies related to the shale industry.

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Associated Press