Complex sentence: His opinion column typically displays a liberal or progressive point of view; in his May 21,2007 column he wrote that the military should drop its "don't ask, don't tell" policy regarding homosexuals in service.
Split into simpler sentences: His opinion column typically displays a liberal, or progressive point of view. In his May 21,2007 column he wrote that the military should drop its "don't ask, don't tell" policy regarding homosexuals in service.