Complex sentence: He dropped out of the race on August 12,2007 following a sixth place finish in the Ames straw poll and went on to endorse Rudy Giuliani for president and then John McCain following Giuliani's withdrawal.
Split into simpler sentences: He dropped out of the race on August 12,2007 following a sixth place finish in the Ames straw poll. Thompson went on to endorse Rudy Giuliani for president and then John McCain following Giuliani's withdrawal.