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FILE - In this Nov. 6, 2018 file photo, a voter in Lake Oswego, Ore., places her ballot in a designated drop box outside City Hall. Days before last November's elections, members of a political action committee in Oregon went door-to-door in Portland and its suburbs and collected filled-in ballots from voters, saying they'd mail them in. But about 100 of those ballots were mailed late and not counted. The group was fined by the secretary of state (AP Photo/Gillian Flaccus, File)

File-This Feb. 6, 2019, file photo shows Treasury Secretary Steve Mnuchin speaking with reporters outside the White House, in Washington. Mnuchin has informed Congress that he will stop making payments into two government retirement funds now that the debt limit has gone back into effect. In a letter Monday, March 4, 2019, to congressional leaders, Mnuchin said that he would stop making investments into a civil service retirement fund and a postal service retirement fund. (AP Photo/ Evan Vucci, File)

FILE - In this Nov. 30, 2018 file photo, Associate Justice Ruth Bader Ginsburg sits with fellow Supreme Court justices for a group portrait at the Supreme Court Building in Washington. Ginsburg is making her public return to the Supreme Court bench, eight weeks after surgery for lung cancer. (AP Photo/J. Scott Applewhite)

Mitch Hungerpiller of Birmingham, Ala., who invented a computerized system to automate the processing of returned mail, visits the Supreme Court in Washington, on Feb. 14, 2019, where his decade-long fight with the post office over patent infringement will be heard. (AP Photo/J. Scott Applewhite)

Acting Environmental Protection Agency Administrator Andrew Wheeler speaks during a news conference in Philadelphia, Thursday, Feb. 14, 2019. Under strong pressure from Congress, the Environmental Protection Agency said Thursday that it will move ahead this year with a process that could lead to setting a safety threshold for a group of highly toxic chemicals in drinking water. (AP Photo/Matt Rourke)

San Francisco firefighters battle a fire on Geary Boulevard in San Francisco, Wednesday, Feb. 6, 2019. A gas explosion in a San Francisco neighborhood shot flames high into the air Wednesday and was burning several buildings as utility crews scrambled to shut off the flow of gas. Construction workers cut a natural gas line, San Francisco Fire Chief Joanne Hayes-White said. (AP Photo/Jeff Chiu)

People help clean up the contents from cargo containers on a beach in Vlieland, Netherlands, Wednesday Jan. 2, 2019, after 270 shipping containers were lost at sea by a cargo ship caught in a storm. Authorities in Germany and the Netherlands were searching for up to 270 shipping containers lost at sea by a cargo ship caught in a storm, saying that a few of them are carrying hazardous material. (Gemeente Vlieland via AP)

Protesters on canoes display placard as construction workers dumped a truckload of sediment on the ground and bulldozed it into the sea at Henoko on Okinawa’s east coast to build a runway for a Marine Corps base, Friday, Dec. 14, 2018. Japan's central government started main reclamation work Friday at a disputed U.S. military base relocation site on the southern island of Okinawa despite fierce local opposition. (Koji Harada/Kyodo News via AP)

FILE- In this Sept. 19, 2018, file photo a tractor operator picks potatoes at Brett Jensen Farms outside of Idaho Falls, Idaho. On Tuesday, Dec. 12, the Labor Department reports on U.S. producer price inflation in November. (John Roark/The Idaho Post-Register via AP, File)