A top Democratic House member on Wednesday warned of the rush to call for President Trump’s impeachment as the “most extraordinary remedy” but recommended an independent commission to examine Trump campaign’s ties to Russia during the election.

“I think we ought to keep our focus on finding out the facts,” said Rep. Adam Schiff, the ranking Democrat on the House Intelligence Committee. “No one ought to rush to embrace the most extraordinary remedy that involves the removal of the president form office.”

He also said former FBI Director James Comey could shed valuable details about his White House meeting with the president in February when Trump asked him to end an investigation into former national security adviser Michael Flynn.

“The best evidence of what happened in the White House would be tapes if they exit – as the president alluded or threatened – and the next best evidence is what the director has to say and what his notes have to say,” said the California Democrat.

He said he hopes Comey will “in all dispatch” speak to congressional committees investigation Russian meddling in the election.

Addressing criticism that Comey knew after his Feb. 14 White House meeting that Trump wanted the case against Flynn dropped but didn’t immediately come forward, Schiff said that would be a “perfectly appropriate question” to ask when he testifies.

He said an independent panel is needed to investigate Russia’s meddling in the election and whether Trump campaign officials had any contacts with Moscow.

“Look at the extraordinary circumstances that have led up to today. If you look at the Russian investigation through the prism of just one person, it underscores just how serious a thorough independent and adequate investigation and Department of Justice and independent counsel is,” he said.

Rep. Elijah Cummings encouraged Republicans to get on board and vote to authorize an independent panel, faulting the GOP for not taking action already.

“Speaker Ryan has shown he has zero – zero – zero – appetite for any investigation of President Trump,” said Cummings (D-Md). “Instead, he appears to have minimized any oversight whatsoever.”