With their majority in the House, they can usually block consideration of Democratic amendments.
Social Security legislation must pass through their committees, and they have the ability to block consideration of measures they oppose.
The House could block consideration of the bill or strip out the tax provisions and send it back for another Senate vote.
Today in the Senate, individual members can block consideration of virtually anything and can do so anonymously for three days.
Republicans blocked consideration of the bill in the Senate today.
The filibuster has already blocked consideration of the bill for more than a week.
Other senators, however, have continued to block consideration.
Wrangling by senators with pet interests continued to block consideration of the bill.
In a close vote, the Senate blocked further consideration of the Administration-supported bill.
The position effectively blocked consideration of Iran's bid for entry.