Sheila Johnson, co-founder of BET and part owner of the D.C.'s WNBA team, has cut a TV ad for Bob McDonnell, the Republican nominee for governor of Virginia. Johnson had endorsed previous Democratic candidates in the state, but she's throwing her name behind McDonnell in this race.

The ad highlights the fact that Johnson is a Democrat, but also focuses on her business acumen. "I know what it takes to start and grow successful businesses, and create jobs," Johnson says in the ad. "That's why I support Bob McDonnell for governor."

The ad is running in Northern Virginia and aims to cut into Deeds' Democratic base of support. Johnson has also campaigned alongside McDonnell in Hampton Roads, where a substantial number of African American voters who supported Barack Obama for president reside.