Poll: Majority of Americans believe top Trump aides should testify

The big picture: The survey also demonstrates that Americans want to hear from White House officials who have first-hand insights into the administration's decision to halt congressionally approved military aid for Ukraine.

• Trump wants Vice President Mike Pence, Secretary of State Mike Pompeo, acting Chief of Staff Mick Mulvaney and other White House officials to stage a public defense of his dealing with Ukraine.

By the numbers: 49% of polled Americans said, regardless of impeachment, Trump improperly pressured Ukraine to investigate former Vice President Joe Biden and his son, while 39% stated Trump did not pressure Ukraine.

• Among Democrats, 85% believe Trump should be impeached and removed, and 86% of Republicans say he should not, according to the Washington Post.
• Independents are deeply split on impeachment, with 47% favoring it and 46% opposed.

Yes, but: Only 62% of those polled said they are closely following the impeachment developments.

Methodology:

This poll was conducted by telephone from Dec. 10-15 among a random national sample of 1,003 adults, 70% of whom were reached on cellphones and 30% on landlines. It has a margin of error of +/- 3.5 percentage points.

Go deeper:

• Impeaching Trump is unpopular in key election states
• Poll: Public opinion is split on impeachment after hearings
• Poll: 81% of voters say their beliefs on Trump impeachment are mostly set