House Democrats have public opinion on their side as they seek special counsel Robert Mueller’s testimony about his report on Russian interference in the 2016 election and allegations that President Donald Trump obstructed justice.

A new Morning Consult/Politico poll, conducted May 10-12, found 56 percent of voters said Mueller should testify before Congress about his report, which totals more than 400 pages, while about a fifth said he should not.

Trump himself has sent mixed signals on the subject. Earlier this month, he tweeted that Mueller “should not testify,” but he later said he would leave the decision up to Attorney General William Barr, who has noted publicly that he has no issue with Mueller appearing before Congress.