Why they say NO! Republicans face a certain death of their Party or a possible death.

All Republicans grabbed onto the "third rail" and voted for the Ryan budget that eliminates Medicare and got a huge shock. Not only that but most people perceive they want to end Social Security also. Now they want to even it up by putting President Obama's and the Democrats hands on that third rail. 

That's why they won't take yes for an answer. And that's why they'll take their chances on default; it’s a choice between certain death of the Republican Party and maybe certain death.

Either Democrats give up all their gains of the last 50 years or our country defaults and Medicare checks don't go out. 

From within their extremist echo chamber the Republicans see either solution as a win.

See:

Why the GOP won't take 'yes' for an answer

bykos