Critical race theory social sciences

That is not evidence. That is an assertion, a speculation, or a conclusion. Furthermore, it does not give any reason why this might be the case. There is nothing about race or racism established in that statement.

The question would be why such a correlation might exist. Since Obama was and is such an obvious racist, the correlation might be that they are simply more prone to detect a racist and not vote for a racist. It need not have anything to do with his race.

Cite the parts of the study (not its assertions, speculations, or conclusions) which you think support your own assertion that McConnell and other white Republicans opposed Obama’s polices in part because he is half black and explain why you think they support it.