Complex sentence: John was reportedly considering a run for Senate in 2000 to replace retiring Senator Daniel Patrick Moynihan, but was later said to be considered running for governor in 2002 against George Pataki.
Split into simpler sentences: John was reportedly considering a run for Senate in 2000 to replace retiring Senator Daniel Patrick Moynihan. But was later said to be considered running for governor in 2002 against George Pataki.