Yes, Fox has leaned left. But John Gibson, Sean Hannity, Brenda Buttner, David Asman and Stuart Varney are the exceptions.
O'Reilly has clearly stated that there are more liberals than conservatives on the FOX line up.
Which still puts them miles ahead of ABCNBCPBSCBS....
I don't have cable so don't watch it, but if bt "leans left" you mean some of their stories have a left leaning slant fine as long as some other stories have a right leaning slant, which is what's missing from the other networks.