You didn't vote for Obama in 2008 nor in 2012. Racism may not have been your reasoning but for many folks in 2016 a very strong anti-Obama (racist) attitude prevailed as well as a misogynistic attitude toward the candidate who happen to have been a woman. These same people voted for McCain and Romney and then came out in droves for Trump. I reject the idea that Obama voters turned to Trump. He won (with Putin's help of course) because too many of Obama's voters stayed home rather than vote for Clinton (probably 70K).