Of course there are

My friend Esha sent me a link to the less-than-surprising column by Elgin Jones in the South Florida Times about John McCain's relatives:

Some of McCain’s black family members say they are not sure exactly where they fall on the family tree, but they do know this: They are either descendants of the McCain family slaves, or of children the McCains fathered with their slaves. White and black members of the McCain family have met on the plantation several times over the last 15 years, but one invited guest has been conspicuously absent: Sen. John Sidney McCain.
“Why he hasn’t come is anybody’s guess,” said Charles McCain Jr., 60, a distant cousin of John McCain who is black. “I think the best I can come up with is that he doesn’t have time, or he has just distanced himself, or it doesn’t mean that much to him.” Other relatives are not as generous.
The reunion’s website, teocfamilyreunion.ning.com, has pictures, postings and other information about the family gatherings. While Senator McCain’s brother, Joe (pictured), and many of his other white relatives attend the reunions, family members say Senator McCain has never acknowledged them, or even responded to their invitations.

Rico says he can't imagine why John McCain, the whitest white man in America, wouldn't want to show up and be photographed hugging (it would be obligatory) his black relatives through his racist ancestors...

Based on information obtained by the South Florida Times, the senator has numerous black and mixed-raced relatives who were born on, or in, the area of the McCain plantation. The mixed races in the family can be traced back to the rural Teoc community of Carroll County, Mississippi, where his family owned slaves.
Senator John McCain’s great, great grandfather, William Alexander McCain (1812-1863), fought for the Confederacy and owned a 2,000-acre plantation named Waverly in Teoc. The family dealt in the slave trade, and, according to official records, held at least 52 slaves on the family’s plantation. The enslaved Africans were likely used as servants, for labor, and for breeding more slaves.
William McCain’s son, and Senator John McCain’s great grandfather, John Sidney McCain (1851-1934), eventually assumed the duty of running the family’s plantation.