While Iowa's incumbent Democratic governor faces a potential uphill re-election next year, things are looking pretty good for Sen. Charles Grassley (R-Iowa), according to a new Rasmussen poll (Sept. 22, 500 LV, MoE +/- 4.5%).

The Des Moines Register reported earlier this week that Grassley's approval rating had dropped nearly 20 points since the beginning of the year, as he's now in the middle of the hot health care debate as the ranking member of the Senate Finance Committee.

Rasmussen's horse race numbers, though, show him in no danger against potential challenger Bob Krause (D).

Grassley 56
Krause 30
Und 7