Fifty-two percent of Democrats said they have no confidence in the office of the president, versus 82 percent of Republicans who said they have at least some confidence.

The share of voters who expressed no confidence in the presidency climbed to 31 percent, from 17 percent in December 2016.

As President Donald Trump prepares to deliver his first State of the Union address next week, a new Morning Consult survey finds public trust in the institution of the presidency has eroded since he was elected in 2016.

In a nationwide poll, conducted online among 1,988 registered voters, 47 percent of respondents said they had little or no confidence in the presidency, up 3 percentage points from a December 2016 survey with Politico. At the same time, 47 percent of voters in the more recent poll, conducted Jan. 4-5, said they had a lot or some confidence in the presidency, down 5 points from the previous survey.

The polls also show that 31 percent of respondents said they had no confidence in the presidency, compared with 17 percent who held that view a month after Trump defeated Democratic nominee Hillary Clinton. That increase set the presidency apart from other institutions included in the polls: The next largest jumps in the share of voters who said they had no confidence in a particular institution were 3 points.

Experts say the shifting numbers about the presidency are, in part, a reflection of Trump’s unpopularity, and the link between the reputation of the office-holder and the office itself — something unique in comparison to other institutions.