13 congressional districts shift in Dems' favor

13 congressional districts have shifted left ahead of November midterm elections, according to the Cook Political Report, with Sean Patrick Maloney's New York district (18) and Dave Loebsack's Iowa district (2) moving from likely Democrat to solid Democrat.

Why it matters: This is yet another sign pointing to a Democratic landslide in the midterm elections, despite the President's popularity rising to 40% since January and Republicans closing in on Democrat's early lead in generic polling, which asks which party voters would support for Congress.