Sen. Susan Collins said she thinks the Intelligence Committee could subpoena President Donald Trump’s tax records as part of its investigation into Russian interference in last year’s election if that’s where the evidence leads.

“I don’t know whether we will need to do that,” the Maine Republican said Wednesday. “If it’s necessary to get to the answers, then I suspect that we would.”

Collins said during an appearance on Maine Public Radio that such a decision would come first from Intelligence Chairman Richard M. Burr and Vice Chairman Mark Warner.

“My hope is that we’ll have a lot of voluntary cooperation,” Collins said. “And keep in mind that in some ways, this is a counterintelligence operation — in many ways — and that’s what our committee specializes in.”

Collins said she would be asking for former national security adviser Michael Flynn to testify before the committee.