Today former Gov. Jeb Bush chatted with Hoover Institution's Peter Robinson on a webcast called Uncommon Knowledge, check it out here. He chats about the candidates about 28 minutes into the interview. Bush said that he's given advice to all the candidates privately saying that they should "be genuine."

He wouldn't endorse anyone but he gave his two cents on the Republican candidates' greatest strengths.

Rudy Giuliani: "Direct, sees the world the way it is, and he's direct and he communicates well and he has high energy and tremendous personality."

Fred Thompson: "Committed conservative." He added that Thompson is "new at the game."

John McCain: "His courage. I was in my bed watching this with my wife and I got out of bed and started cheering," when McCain mentioned the woodstock line during the last debates.

Mitt Romney: "Intellectual curiosity. . .He's incredibly smart and
asks the questions necessary to find that common ground for the next
challenges we face, which politics is not very good at right now."

Mike Huckabee: "I like him. He's a great speaker and clear-minded about the importance of moral principles."