MADISON, Wis.  Over shouts of protest from Democrats, the Republican-controlled Wisconsin State Assembly passed a bill in the early morning hours Friday that would strip state employees of most of their collective bargaining rights. But there was no sign that a stalemate over the proposal would end, as Democrats in the Senate remained out of the state after fleeing to prevent their own vote on the proposal.

The 51-to-17 vote just after at 1 a.m. in the Assembly drew boos and shouts of “Shame! Shame!” from Democrats who said that leaders had abruptly cut off debate and prevented more than a quarter of the legislators from casting votes. It came during the second week of sustained demonstrations inside and around the Capitol. Union workers and others from Wisconsin and nearby states continued to protest the proposals backed by the new governor, Scott Walker, a Republican elected in November.

Some Republican leaders in other states have moderated their talk against state employee unions in recent days. But in Wisconsin, Mr. Walker traveled the state on Friday in an effort to put more pressure on the Senate’s 14 Democrats to return from Illinois.