Complex sentence: In 1953, Kuchel was appointed to the U.S. Senate by Governor Earl Warren to fill the vacancy created after Republican Senator Richard M. Nixon was elected Vice President, after then-actor Ronald Reagan turned down the offer.
Split into simpler sentences: In 1953, Kuchel was appointed to the U.S. Senate by Governor Earl Warren to fill the vacancy created after Republican Senator Richard M. Nixon was elected Vice President. Governor Warren had first offered the seat to then-actor Ronald Reagan, but Reagan turned down the offer.