YORK, MAINE — Oyster farmer Graham Platner unveiled a policy agenda for his U.S. Senate bid at a campaign event in York, Maine, pledging to push Democrats to replace Senate Minority Leader Chuck Schumer, weaken the filibuster, expand the Supreme Court and pursue the impeachment of two conservative justices. He said he would press the party to rethink its vision of power and adopt an aggressive reform agenda if elected.

Platner also called for organizing an anti-war movement and said he sees himself as an heir to the legacy of Sen. Bernie Sanders, who has endorsed him in the competitive Democratic primary. Numerous recent polls show him leading Gov. Janet Mills and Sen. Susan Collins.

"I very much want to see this politics continue into the future. That's why I'm doing this," Platner said.

Platner said President Donald Trump has committed impeachable offenses, citing rank corruption, self-enrichment, crypto scams and potential insider trading if associates bet on outcomes they know will occur. The White House has denied that administration officials have engaged in insider trading.

He said Democrats should focus resources on investigations rather than pursue impeachment if they do not have the votes to convict. He outlined an oversight strategy centered on congressional subpoenas.

"I want to shut the White House down. I want us to, for the next two years, be dragging every single person in the White House, every single person in all these agencies that have been conducting themselves in illegal and unconstitutional ways. They need to be dragged by subpoena in front of Senate committees over and over and over again," he said.

He singled out immigration enforcement as a target of those investigations, saying the inquiry should encompass those "involved in putting ICE agents in our streets, murdering American citizens, terrorizing communities."

On the judiciary, he said he wants Congress to impose ethics standards on the Supreme Court and is open to adding seats to the bench. He said he would push the House to impeach Justices Clarence Thomas and Samuel Alito, adding: "There's a compelling case against both of them. The relationship between Clarence Thomas and Harlan Crow is not hard to see as clearly corrupt, and Justice Thomas doesn't even recuse himself from cases that impact Crow's business."