Lawmakers and senior aides are privately predicting they will lose more than the two Democrats who opposed the impeachment inquiry rules package in late September, according to multiple officials who spoke on the condition of anonymity to talk frankly. Two senior Democratic aides said the total could be as many as a half-dozen, while a third said the number could be higher.

Predictions about some defections come as a core group of centrists from districts Trump won in 2016 are having second thoughts. While many knew impeachment would never be popular in their GOP-leaning districts, some have been surprised that support hasn’t increased despite negative testimony about Trump from a series of blockbuster hearings last month.

Several moderates have privately pined for other options, including a censure vote they know they’re unlikely to get. Others have even considered what one moderate called “splitting the baby”: backing one article of impeachment but not the other to try to show independence from the party.