Is Hillary just playing to the center when in reality she is much more liberal?

[Quixote1818]

Thom Hartman was giving a history of many Democrats like FDR, Johnson etc. who did this then once they became president they shifted back to the left. He thought Hillary might have decided to go this route thinking she has a big enough lead even though she could cause the base to lack enthusiasm.

Also, I think it's a given that she will fire up the Republican base but I have also heard that there is a whole other demographic that usually doesn't vote that is expected to come out for her.

Thoughts?