The poll found that a clear majority of registered voters (55 percent) now want to hear Bolton’s testimony, up 2 percentage points from the previous Yahoo News/YouGov poll, which was conducted before the Bolton news broke. Only 29 percent of registered voters say they don’t want to hear from Bolton.

Seeking to gauge how views on impeachment have shifted over the last week, the new poll surveyed the same voters as the earlier poll and was conducted Jan. 28 and 29.

Among the more than 1,200 respondents surveyed both before and after the Bolton revelations, 23 percent of those who initially said the Senate should not call new witnesses have changed their mind since last week, with 11 percent now saying the Senate should call new witnesses and 12 percent now saying they’re not sure. A smaller percentage (16 percent) have moved in the opposite direction on witnesses, from “yes” to “no” or “not sure.”