Complex sentence: As a student Matt Campbell volunteered and interned for U.S. Senator Tom Harkin in his Sioux City office and campaigned for Senator Harkin in Iowa and New Hampshire in his 1992 run for United States President.
Split into simpler sentences: As a student Matt Campbell volunteered and interned for U.S. Senator Tom Harkin in his Sioux City office. Campbell campaigned for Harkin in Iowa and New Hampshire during his 1992 run for United States President.