Sen. Vincent Sheheen, the presumptive Democratic nominee to challenge Gov. Nikki Haley for the governor’s seat in the upcoming November general election, called out New Jersey Gov. Chris Christie for hypocrisy.

Sheheen sent a letter to Christie calling on the N.J. governor to explain why the Republican Governors Association, which Christie chairs, financed an ad attacking Sheheen for Sheheen’s stance on Medicaid expansion.

Sheheen’s reasoning? The ad attacks Sheheen for taking a position, regarding federal dollars for Medicaid expansion, that Christie shares and has already accomplished in New Jersey.