Complex sentence: A number of Romney's descendants have became prominent in U.S. politics, his son, George W. Romney, was a two-term governor and a presidential cabinet member, his grandson, Mitt Romney, is currently running for U.S. President.
Split into simpler sentences: A number of Romney's descendants have became prominent in U.S. politics. His son, George W. Romney, was a two-term governor and a presidential cabinet member; his grandson, Mitt Romney, is currently running for U.S. President.