The lion’s share of voters still back the Senate removing President Donald Trump from office, but as the chamber’s leaders begin negotiations over the terms of the trial, most also want to hear from more witnesses, according to the latest Morning Consult/Politico poll, the first survey of registered voters conducted entirely after the House’s impeachment vote on Wednesday.

The Dec. 19-20 poll found overall support for Trump’s removal was largely unchanged since before the House’s vote, with 51 percent of voters approving of the move and 42 percent disapproving. Roughly the same share of voters approve (52 percent) and disapprove (43 percent) of Trump’s impeachment in the House, numbers that were statistically unchanged from a Dec. 14-15 poll.

The new survey, which has a margin of error of 3 percentage points, also found most voters appear to be siding with Senate Minority Leader Chuck Schumer (D-N.Y.), who has called on Senate Majority Leader Mitch McConnell (R-Ky.) to allow the chamber to issue subpoenas for four current and former Trump administration officials who did not appear when they were asked to testify during the House’s impeachment inquiry.