What, you perceive that i, or any other Democrat does or doesn't do, has absolutely NOTHING to do with why Republicans THEMSELVES do NOT elect blacks nor women in any significant number.
Why is that?
democrats are motivated by power. The party exists to establish an authoritarian regime ruled by an elite. democrats look to manipulate groups, blacks, Mexicans, homosexuals, Muslims, etc. To achieve this, the party offers benefits to leaders of these groups. A Jesse Jackson or Tony Villar will be very wealthy men. The party will steer graft and booty into the hands of these "leaders" in exchange for securing the vote of the group. These leaders secure the votes of the group by buying them off with drivers licenses for illegal aliens, dropping the work requirement from welfare, and other gimmee programs. Since power for the elite is the only principle there is for democrats, there is never a conflict.
The right is built on principle. The goal of the right is to secure liberty, the Republican ideal that was outlined by Locke of life, liberty, and private property. Because the right is founded on principle, rather than the lust for power, then voters seek candidates who espouse (and occasionally actually support) the ideals of Paine, Mason, et al.
democrats put people in office to appease the groups they seek to control, Republicans put people in office based on the principles that person supports.
I'm not part of the Republican party, I belong to the LPUSA - but I am very much a Republican in the way that George Washington and Thomas Jefferson were Republicans. I support life, liberty, and private property - I view the ONLY legitimate purpose of government to secure and protect these.
democrats seek only power, in hopes that their rulers will throw scraps to their group. Group identity is paramount to extending that power, democrats vote for race and gender as a means of solidifying power over the groups. democrats have disdain and open contempt for the individual, and for individual rights. Rights, or more accurately, privilege accrues to the group, not to a person. What privilege the rulers of the party grant to a person depend on what group or groups that person belongs to.
The right will elect those who uphold the ideals of liberty. Race and gender are irrelevant, only principle matters.
If a principled black man like Herman Cain becomes popular, the democrats attack with unbridled viciousness, because no person should act outside of the group. The party has assigned the beliefs that black people may hold, to defy them is to be an enemy of the party.
You will savage Ben Carson for having thoughts outside his group identity. You will use racism as the vehicle, but the real issue is that a person demonstrating individual thought is a threat to the system of accruing rights to groups.