In the possible rematch in Michigan’s 7th Congressional District, there seems to be no independent polling yet. By request I looked for polls on this race, but for the budding 2010 matchup of Tim Walberg and Mark Schauer all I find is one internal poll.
Walberg’s is good for him showing 46 R/37 D/5.6 MoE for a 78% win rate for the Republican. I expect real polling only after the primary for a race like this.
House of Representatives Swingometer
Electoral College Swingometer