Canada>Canada how long do you take cialis for In the case of immigration reform, there are 201 Democrats in the House caucus. If literally all of them are prepared to support the bipartisan Senate bill, they would need 17 House Republicans -- just 7% of the 231 GOP House members -- to join them on the discharge petition. If, say, 10 conservative "Blue Dog" Democrats from Southern states balked, they would need 27 Republicans to break party ranks.