Cenk Uygur takes us through the Donald's many, many flip-flops over the years where he's taken political positions that were apparently the most convenient at the time, the worst being that although he claims that he's "pro-life" now, he's completely clueless when it comes to the legal basis of Roe v. Wade which made abortion legal in the United States.

TPM has more on his interview with Savannah Guthrie -- Pro-Lifers: Donald Trump Doesn't Understand How Pro-Life Works (VIDEO):

Donald Trump is 100% pro-life. Except when it comes to the basis of Roe v. Wade which made abortion legal in the United States. That he agrees with, 100%.

In an interview with MSNBC's Savannah Guthrie, Trump was asked if he believes there's a right to privacy in the Constitution.

The question is an important one in the abortion debate. Pro-lifers say there absolutely is not a Constitutional right to privacy, which means Roe is a travesty and abortion should once again be permitted to be outlawed in the states that choose to do so. Pro-choicers strenuously disagree, stating that the right to privacy is guaranteed and is extended to a woman's choice to have an abortion or not, the central basis of Roe.

Trump apparently thinks he can split the difference, and appeared to have no understanding of the connection between the view of a right to privacy and the abortion debate.

"I guess there is, I guess there is," Trump said when Guthrie asked if there's a Constitutional right to privacy. "And why, just out of curiosity, why do you ask that question?"

Guthrie informed him of the connection to abortion, but Trump seemed surprised that the two went together.

Cenk called Trump a classic carnival barker. I'd say that description is about right. What's astounding is how far off of the cliff the base of the Republican Party has fallen that Trump is actually leading in the polls of their potential presidential primary candidates right now.