Republicans will use scare and shyster tactics if the Democratic nominee for president is a woman or a black. Have little doubt, they will fearmonger and play to the lowest common denominator.
They did this in a close race for the US Senate in Tennessee last year. The Republican National Committee ran a disgustingly racist ad against Harold Ford, Jr. (an African-American), and it appears to have tipped the contest in favor of the Republican Bob Corker, who now represents the state of Tennessee in Congress.
Here is the relevant portion from this Wikipedia entry: http://en.wikipedia.org/wiki/United_States_Senate_election_in_Tennessee,_2006
[edit] Television advertisement controversy
"Harold, call me," says a blonde woman in RNC's controversial attack ad against Ford.
A particularly negative ad titled "Call Me" endorsed by the Republican National Committee ("RNC") that aired during the third and fourth weeks of October gained national attention and condemnation from both Ford and Corker. The ad portrayed a scantily clad white woman (Johanna Goldsmith) acting as a Playboy bunny who "met Harold at the Playboy party" and invites Ford to "call me".[21][22]
Responding to questions about the ad, a Ford spokesperson said that Ford went to a 2005 Playboy-sponsored Super Bowl party that was attended by more than 3,000 people,[23] and Ford himself said that he likes "football and girls" and makes no apology for either.[24]
The NAACP described the ad as "a powerful innuendo that plays to pre-existing prejudices about African-American men and white women" and a former Republican Senator called it "a very serious appeal to a racist sentiment."[25] Corker condemned the RNC ad, calling it "tacky" and stating that his campaign has asked to have it pulled.[26] The RNC, however, continued to endorse the ad, said it had no plans to stop airing it, and dismissed charges of racism, saying it "wouldn't even entertain the premise" that the ad was racist.[27][28] In an October 24 interview with Tim Russert, RNC chairman Ken Mehlman said that he thought the ad was "fair" and that he did not have the authority to pull it.[29]