As I've been saying all along, the Republicans care only about being in power. When a Democrat gets elected president, they go into a four year long temper tantrum. They refuse to cooperate with anything the Democrats do, because they don't want the Democratic president to get credit. They want him to fail, and they don't care what damage they might do to the country in the process.
The debt limit was raised SIX TIMES during GW Bush's two terms, TWICE in 2008 alone. The bill the Republicans refused to allow to pass, raising the debt ceiling, was INTRODUCED BY REPUBLICANS! When the Democrats finally said "Okay, we'll go with that," the Republicans changed their minds.
This has happened over and over. Remember GHW Bush tried his entire term to get NAFTA passed, and of course when it didn't pass he blamed 'Democrat obstructionism'. But when Clinton came in he had no trouble getting it passed, and then, of course, the Republicans decided it was just the worst idea ever.
The Paul Ryan proposal to privatize Medicare was deliberately written to be so extreme that there was no chance of it getting even scant Democratic support. Because if it passed, Obama and the Dems would get credit. In fact, the Ryan proposal was so extreme that even most Republicans wouldn't support it.
This is what we're going to be seeing from the Republicans for the next five years at least, through Obama's 2nd term, and longer than that if they don't take back the White House in 2016. It's nothing new--they treated Clinton the same way, and Carter.