Rothenberg's bizarre comparison

Roll Call's Stuart Rothenberg writes:

Voters shouldn't judge a candidate by his skin color. Maybe, but is it any more unfair than, for example, saying that because McCain and President Bush are both Republicans that a McCain administration would produce a third Bush term? No, it isn't.

First, people aren't saying that a McCain administration would produce a third Bush term because McCain and Bush are both Republicans. They're saying it because McCain voted with Bush 95 percent of the time last year - highest in the Senate - and 90 percent of the time since Bush took office. They're saying it because McCain has bragged about how much he agrees with Bush. They're saying it because McCain supports Bush's war. They're saying it because McCain supports Bush's tax cuts for the rich.

Aside from that ... seriously? Rothenberg thinks it is no more unfair to judge a candidate by his skin color than to judge him by the political party he chooses to join? Candidates presumably choose which party to join based on their assessment of which party best reflects their values and policy views. They are intentionally telling voters something about themselves by the party they choose. I assume it is obvious how that differs from skin color.

Thanks to Media Matters intern Varun Piplani for flagging Rothenberg's claim.