Since the official inquiry began on Sept. 24, POLITICO/Morning Consult polls have shown remarkable stability in public support for the probe. In nine surveys since early October, support has ranged from 48 percent to 50 percent, while opposition has been from 41 percent to 45 percent.

The numbers cast doubt on Republicans’ claims that, as Democrats in the House majority have laid out their case, impeachment has become less popular. But they also show — despite wall-to-wall televised hearings and, at times, bombshell testimony — Democrats have failed to convert voters who were skeptical of the probe, including a small share of the electorate that disapproves of the president’s job performance.

Views of the impeachment inquiry split sharply along party lines: Eighty-three percent of Democratic voters support the inquiry, while 81 percent of Republicans oppose it. Among independent voters, 45 percent support the inquiry and 41 percent oppose it.

Public opinion of the next two steps in the impeachment process closely tracks with overall backing for the inquiry: Fifty-one percent of voters would support the House voting to impeach Trump, and 49 percent would support conviction and removal by the Senate.

The POLITICO/Morning Consult poll was conducted Dec. 6-8, prior to House Democrats’ announcement Tuesday that they would pursue two articles of impeachment against Trump, charging him with abuse of power and obstruction of Congress.

While impeachment hasn’t become more popular over the past two months, the president’s stance — that his conduct was entirely appropriate — is shared by less than a third of voters. Only 29 percent say Trump “acted appropriately, and Congress shouldn’t impeach him and remove him from office.” By comparison, 46 percent say “Trump committed impeachable offenses, and Congress should remove him from office,” while 16 percent say “Trump acted inappropriately, but Congress shouldn’t impeach him and remove him from office.”

Despite consistent plurality support for the impeachment inquiry, few voters expect him to be removed. Only 21 percent say it’s “very” or “somewhat” likely he’ll be impeached or removed.

The poll also shows a small slide for Trump’s job approval rating, bringing the president to a new low in POLITICO/Morning Consult polling.