That depends on just how radical his behavior was. If he was hanging around with Bill Ayers and Bernadine Dohrn at that point in time, it's going to be a problem.
I seem to remember the liberals caring a whole lot about what W was like in college.
They really dug into Palin’s youthful days as well.
The only time somebody “doesn’t care” about somebody’s past - you can bet that somebody is a liberal.