Byrd's replacement will be named by Friday

The $34 billion extension would provide benefits for more than 2.5 million people whose unemployment insurance expired June 2. 

Those who have been unemployed for six months are more can receive weekly checks for up 99 weeks in some states, based on the unemployment rate.

Manchin also sent a bill Tuesday to the state legislature to authorize a special election for November to elect Byrd's successor.