You may be right, but I have the gravest doubts. Black Republican candidates tend to fare as badly with blacks as do white Republicans. Judging by Twitter, where black Americans are very active, exceedingly few voice anything but hostility to Cain, other than the few dedicated black Republicans. Methinks Cain is whistling past the graveyard when he speaks of hoping to win a third of the black vote in a general election against Obama. I’d be surprised if he broke 10%.
I don't think getting a big % of blacks to vote Republican (conservative ) will ever be realistic. But if Cain could effectively repeat to them how Obama has failed them and that they are victims of Obama, they very likely will stay home. Cain needs to be careful with the ‘Unemployed voters are lazy’ messages popular here. That can backfire later as Sharon Angle found out.
Then you got whites who leaned to Obama because he is black. Putting up a black conservative against Obama would really put a different view on MSNBC saying nightly that Republicans hate blacks, while they are trying to destroy Cain.
I dont see other scenareos that look that interesting to me than Cain-Obama. Perry could interest me if he did a public read my lips statement on path to legalization of illegals, but looks like he wont.