This is knowing the poll is likely already weighted anti-Trump.
Via The Hill:
Support for President Trump’s impeachment slipped 4 percentage points since mid-October, according to a poll released Wednesday.
The Morning Consult survey found that 47 percent of respondents now back impeachment. In mid-October, a record-high majority — 51 percent — supported it.
Those opposed to impeachment held steady at 43 percent, where it has stood since House Democrats launched an impeachment inquiry over the president’s dealings with Ukraine in September.
Responses on how House Democrats have managed the inquiry are also virtually unchanged in the new survey, with more than 4 in 5 Democrats backing their representatives in the House and a similar number of Republicans disagreeing with the House Democrats’ methods.