Complex sentence: Alejandro "Alex" Castellanos (born 1954) is an U.S. Republican Party political media consultant who specializes in television advertising, and was a top media adviser to George W. Bush's 2004 presidential campaign and Mitt Romney's 2008 presidential campaign.
Split into simpler sentences: Alejandro "Alex" Castellanos (born 1954) is a U.S. Republican Party political media consultant who specializes in television advertising. He was a top media adviser to George W. Bush's 2004 presidential campaign and Mitt Romney's 2008 presidential campaign.