Byron York  After Obama won re-election, there was extensive
discussion among his supporters about whether the Republican
"fever" would, in fact, break. Would the fiscal cliff
negotiations, which resulted in the GOP accepting a tax increase
on the nation's highest earners, do the trick? If not, would
coming fights over the debt ceiling and sequestration finally
cure the Republican illness?  There was little speculation about
whether something very different might happen: Would determined
GOP opposition break Obama's fever? That is, could Republicans
weaken the president's resolve to defeat the GOP and further
raise taxes? That appears to be what has happened, at least for
the moment. Republican determination to go through with
sequestration, which Obama warned would have disastrous
consequences nationwide, seems to have forced the president to
change course.  At his March 1 news conference after meeting
Republican leaders in the White House, Obama seemed resigned to
the possibility that he cannot win the tax