I'm trying to decide how to vote in November

I'm trying to decide how to vote. I'm a lifelong Democrat and working man. Tonight I went to http://www.barackobama.com/issues/healthcare/ It seems to me that Barack has toned down his message about reforming the FDA and big Pharma since the primaries. Am I missing something ? Why is my biggest current hero in the fight to get unbiased medical research done on medicating children with psych meds a Republican senator from Iowa ? Because he is really doing something.