In Pennsylvania’s special House election, Democrat Mark Critz says internal polling puts him ahead by 8 percentage points; the DCCC’s internal polling put him up 2. But the PPP poll put Republican Tim Burns up by 3, and the Kos poll put Burns up by 6. Public Opinion Strategies put Burns up by 4 three weeks ago.

Bottom line? Close race, nobody should take this one for granted. It’s a Democratic district, but a conservative Democratic district.