South Carolina Gov. Nikki Haley (R) is appearing at a fundraiser for her predecessor and former mentor -- embattled 1st district House candidate Mark Sanford.

In this March 15, 2013 file photo Republican governor of South Carolina Nikki Haley speaks at the 40th annual Conservative Political Action Conference (CPAC) in National Harbor, Md. (AP Photo/Manuel Balce Ceneta, File)

Haley is a "special guest" at Wednesday evening's event, according to an invitation first obtained by the blog Tickets to the reception cost $250; sponsorship costs at least $1,000.