Apparently somebody played a dirty trick and made anti-Brown phone calls calling themselves MCFL.
From Lady in the Pew
Albeit a tough situation, I'm not at all sure that MCFL is in a position to whine all that much. The charge—and I'm assuming it's true although I'm not at all sure I should presume anything MCFL says is true, but let's say it is—is deplorable, of course. But then MCFL isn't all that lily-white either, when it comes to the truth-telling department. What goes around, etc., etc.
I hope Scott Brown defeats Coakley. If he does—or if he doesn't—the real work begins. That is, restoring what is left of the pro-life movement in Massachusetts.