Speaking from the Senate floor Wednesday morning, Minority Leader Charles E. Schumer suggested what he called the best solutions for getting answers about whether President Trump asked former FBI director James Comey to end an investigation:

Tapes, transcripts and testimony.

“The president said Mr. Comey was wrong. Prove it. It’s easy to prove — as long as there are tapes or transcripts,” said Schumer, a New York Democrat. “If the president is right, he’ll have no problem releasing tapes or transcripts.”

Schumer was part of a chorus of legislators calling for an independent investigation into whether Trump revealed confidential intelligence to Russian diplomats or pressured Comey to end the investigation into former national security adviser Michael Flynn.

According to a memo Comey wrote after his conversation with the president, Trump said “I hope you can let this go.” And a Trump tweet raised questions about whether the president has recordings of his meeting with Comey.

Members of congressional intelligence and judiciary committees said on Wednesday that they hadn’t seen Comey’s memo.

Schumer, in his remarks on the floor of the Senate, said the evidence “may be the only way for this administration to credibly make a case to a justifiably skeptical American public.”

“How can someone trust anyone in the presidents’s chain of command, anyone the president has appointed?”