Complex sentence: Robert M. "Bob" Shrum, (born 1943) is an American political consultant, who has worked on numerous Democratic campaigns, although he has been part of many non-presidential Democratic campaign victories, he has never advised a winning presidential campaign.
Split into simpler sentences: Robert M. "Bob" Shrum, (born 1943) is an American political consultant, who has worked on numerous Democratic campaigns. Although he has been part of many non-presidential Democratic campaign victories, he has never advised a winning presidential campaign.