Complex sentence: In 1994, he won the Democratic nomination for Governor of Michigan and selected one of his former rivals in the Democratic primary, State Senator Debbie Stabenow (now a US Senator), as his nominee for Lieutenant Governor.
Split into simpler sentences: In 1994, he won the Democratic nomination for Governor of Michigan. Wolpe then selected one of his former rivals in the Democratic primary, State Senator Debbie Stabenow (now a US Senator), as his nominee for Lieutenant Governor.