Also presidents can’t be impeached for lying even for lying under oath unless you believe in double standards,
Can't be impeached? He was impeached, it's a fact that presidents can, indeed, be impeached for lying and obstruction of justice.
As for the statement " A president can now screw interns in the oval office and it is no one's business but his, his wife and the intern", sure some have said that (although, FWIW, he was not impeached for the sexual acts, even the republicans said that), but certainly not all "liberals" did (nor were all who said it "liberals. Next you're going to tell me the man who cut taxes and signed the welfare reform act before the election was a "liberal". Come on, he was a democrat, but he was hardly a liberal, nor were his policies--at best he was a centrist.