Johnson had the political muscle to pass Medicare because the 1964 elections ushered in 42 new Democrats to the House of Representatives, [Sound Familiar?] giving the party a two-thirds majority overall and a larger majority on the Ways and Means Committee, where the legislation would originate. Up until then, many members of the committee, including its Democratic chairman, Wilbur D. Mills, opposed the idea of government-funded health care. In fact, Mills proved a tough sell in 1965 until some of his own pet proposals were added to the legislation. One of those — the addition of a voluntary, supplemental health care plan — had its roots in a Republican alternative bill.
In the House, no Republicans voted for the bill until it reached the floor [Again, sound familiar?]. It passed the Ways and Means Committee by a party-line vote of 17-8, although the panel's GOP members endorsed some of the bill's non-health care related provisions, according to the 1965 Congressional Quarterly Almanac .
Likewise, all four Republicans on the House Rules Committee — the panel that sets the boundaries of debate on all bills that come to the House floor — voted against the bill.