Washington (CNN) A former Trump transition team staffer is calling for impeachment of President Donald Trump after reading special counsel Robert Mueller's report, arguing there is "more than enough here to get that started."

"If you look at the report, it's clear it's a referral to Congress to begin impeachment proceedings. That was the only choice left to Mueller after the restrictions placed on him by DOJ policy," J.W. Verret told CNN's John Berman Thursday on "New Day."

"There's more than enough here to get that started," he added.

He told CNN it's up to the Democratic leadership to start the impeachment process, saying, "They need to have the guts to jump on this."

Asked what he's calling on Republican members to do, Verret replied, "As the hearings go forward, ask honest questions."

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