"...Some of the last fireworks of the night came when Cruz attacked Trump's supposedly "very, very liberal" policies."Flexibility is a good thing, but you shouldn't be flexible on core principles," Cruz said. "I like Donald. He is an amazing entertainer. But his policies for most of his life..have been very, very liberal."Cruz continued:For most of his life, he has described himself as very pro-choice and as a supporter of partial-birth abortion. Right now today as a candidate, he supports federal taxpayer funding for Planned Parenthood. I disagree with him on that."You are the single biggest liar," Trump shot back. "You...