NULL SET....I tuned in too late to hear Mitt Romney's "null set" answer last night, but apparently his algebraic illiteracy is nothing compared to his ignorance of actual events from four years ago.  Here's his answer to a question about whether it was a mistake to invade Iraq: … WTF?

Pew Poll: Most Voters Dim  —  Last night, I complained about the repetitive nature of the questioning at the debates.  For the third straight debate, Rudy Giuliani had to state his position on abortion, and Mitt Romney had to answer for his change of position over the last two-plus years.

Giuliani will skip August straw poll  —  New Yorker plans "non-traditional" caucus run  —  Republican presidential candidate Rudy Giuliani plans to skip the Ames straw poll in August, but compete to win the leadoff Iowa caucuses, a gamble by the former New York Mayor on a "non-traditional" caucus campaign and a first for Iowa.

Turkish officials: Troops enter Iraq  —  ANKARA, Turkey - Several thousand Turkish troops crossed into northern Iraq early Wednesday to chase Kurdish guerrillas who attack Turkey from bases there, two Turkish security officials said.  Turkey's foreign minister denied its troops had entered Iraq.