Convergence?

To what do these numbers refer?

32, 25, 21

Give up?

They are, respectively, the percentage of Americans who identified themselves as Republicans on Election Day 2008, at the end of March 2009, and last week, three weeks through April.

One more number, reported in March:

19

That's Rush Limbaugh's "favorable" rating.

Another way to think about this: maybe it's the explanation for Michele Bachmann's 80%, and she just forgot to say "not."

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[Added] Still another way to think about it, as maru observes: the most recent dip in GOP affiliation came after the big day of teabaggery.