He also added that Tim Scott, a black from South Carolina, won his re-election bid to the Senate.
"I meant that they used to call themselves 'slave-holding states,' " he told CNN. "They've been frustrated with the Emancipation Proclamation. They became Republicans, then tea party people. These are the people that are trying to frustrate people from voting, changing the voting rights that we fought so hard for. And all I'm saying is, if you want to challenge the statistics, find out where the slave-holding states are — find out where the tea party is."