The House of Representatives is set to vote today on a measure that would pave the way for Congress to quickly repeal the Affordable Care Act, with no possibility of a filibuster by minority Democrats in the Senate. House Speaker Paul Ryan worked Thursday to reassure Republicans who are nervous about overturning President Obama’s signature healthcare law without a plan in place to replace it. Ryan can afford to see as many as 23 Republicans defect, and still pass a repeal measure.