Obama reportedly overcome with jealousy.

Via ABC News:

What is it with Chris Christie and Democratic presidents?

First, the Republican governor from New Jersey surprised his party by embracing – both figuratively and literally – Barack Obama.

Now, Christie’s headlining the closing ceremonies of Bill Clinton’s annual international forum in Chicago.

Sources close to both Clinton and Christie said today’s session – called “Cooperation and Collaboration: A Conversation on Leadership” – is the product of an odd-couple pairing of Clinton and Christie that has developed in the four years since the popular former president tried unsuccessfully to end Christie’s political career before it really took off.

“They’re both similar in a lot of ways,” one Clinton insider told ABC News. Clinton “respects him and his nature and he likes him as a person. Clinton likes the straightforward style, they have similar backgrounds, they were both prosecutors – Clinton as an attorney general in Arkansas. They’re both normal guys from humble beginnings.”

The unpredictable Christie was a key fundraiser and campaigner last year for Obama’s GOP challenger, Mitt Romney. In return, the first-term Republican governor got to deliver the keynote speech at the Republican National Convention in Tampa.