Harvard is happy to have conservatives as well as liberals. At one of my college reunions Grover Norquist and Patrick Deval (both in my class) had a lively debate.
I believe there are currently more conservatives in Congress who attended Congress than liberals.
According to the Daily Beast as of 2014:
Tom Cotton (Ark.)
Ben Sasse (Neb.)
Dan Sullivan (Ak.)
Elise Stefanik (NY)
Ted Cruz (Tex.)
Pat Toomey (Penn.)
David Vitter (La.)
Mike Crapo (Wyo.)