Both political and racial polarization would have been worse as the black community would view Obama's loss of the nomination as being a sign of rampant racism, while actual white nationalists hated her already. Meanwhile, the GOP wave of 2010 would mean endless Whitewater-style investigations - and I'm sure she and Bill would give them plenty of material. Her policies would be very mediocre like Obama - a bit more left in some areas, a bit more right in others - and the same gloom and anti-politics politics we saw in 2016 would stll materialize.
I don't even want to think about how gender polarization would have turned out...
There are many factors that led Trump,s rise. I don,t think there would of been a birther movement.