Nuclear energy regulation

In this June 12, 2018, photo, President Donald Trump meets with North Korean leader Kim Jong Un on Sentosa Island in Singapore. Trump credits his accord with North Korea’s Kim Jong Un with saving tens of millions from nuclear war. Now he just has to get everyone else on board. Frustrated with lukewarm backing from congressional Republicans, criticism from Democratic opponents, and skepticism from allies and the media, President Donald Trump made an extraordinary stop on the North Lawn of the White House Friday to promote the nuclear deal that critics have decried as a vague and lacking in clear objectives. (AP Photo/Evan Vucci)

FILE - In this March 15, 2018 photo, Energy Secretary Rick Perry appears before a House Appropriations subcommittee hearing on Capitol Hill in Washington. Perry is defending President Donald Trump's call to bolster struggling coal-fired and nuclear power plants, saying a rash of plant retirements is "alarming" and poses a looming crisis for the nation's power grid. (AP Photo/Andrew Harnik)

President Donald Trump meets with Japanese Prime Minister Shinzo Abe in the Oval Office of the White House in Washington, Thursday, June 7, 2018. Abe is expected to make sure Trump doesn't overlook Japan's security and other concerns at next week's U.S.-North Korea summit. (AP Photo/Susan Walsh)

FILE - In this April 16, 2018, file photo, Sen. Rob Portman, R-Ohio, speaks during a news conference in Cincinnati. The Obama administration secretly sought to give Iran brief access to the U.S. financial system by sidestepping sanctions kept in place after the 2015 nuclear deal, despite repeatedly telling Congress and the public it had no plans to do so. That’s according to an investigation by Senate Republicans released June 6. “The Obama Administration misled the American people and Congress because they were desperate to get a deal with Iran,” said Portman, the subcommittee’s chairman. (AP Photo/John Minchillo, file)

FILE - This April 9, 2015, file photo shows the south portal of the proposed Yucca Mountain nuclear waste dump near Mercury, Nev. The House is moving to approve an election-year bill to revive the mothballed nuclear waste dump at Nevada's Yucca Mountain despite opposition from home-state lawmakers. (AP Photo/John Locher, File)

FILE - This April 9, 2015, file photo shows the south portal of the proposed Yucca Mountain nuclear waste dump near Mercury, Nev. The House is moving to approve an election-year bill to revive the mothballed nuclear waste dump at Nevada's Yucca Mountain despite opposition from home-state lawmakers. (AP Photo/John Locher, File)

President Donald Trump blows a whistle to start a race for the annual White House Easter Egg Roll on the South Lawn of the White House in Washington, Monday, April 2, 2018. (AP Photo/Andrew Harnik)

President Donald Trump stops to speak to members of the media as he arrives for Easter services with first lady Melania Trump at Episcopal Church of Bethesda-by-the-Sea in Palm Beach, Fla., Sunday, April 1, 2018. (AP Photo/Pablo Martinez Monsivais)

Energy Secretary Rick Perry speaks at a House Appropriations subcommittee hearing on Capitol Hill in Washington, Thursday, March 15, 2018. (AP Photo/Andrew Harnik)

This 2010 photo shows Exelon Corp.'s Oyster Creek Generating Station, a nuclear power plant in Lacey Township, N.J. The oldest nuclear power plant in the United States will shut down in October, more than a year ahead of schedule. Chicago-based Exelon Generation says the Oyster Creek plant will close this fall. It had a deadline of Dec. 31, 2019, under an agreement with state authorities. (Peter Ackerman/The Asbury Park Press via AP)