Complex sentence: On July 14,2017, McCain underwent a minimally invasive craniotomy to remove a blood clot above his left eye at Mayo Clinic Hospital in Phoenix, prompting Senate Majority Leader Mitch McConnell to delay a vote on the Better Care Reconciliation Act.
Split into simpler sentences: On July 14,2017, McCain underwent a minimally invasive craniotomy at Mayo Clinic Hospital in Phoenix in order to remove a blood clot above his left eye. This prompted Senate Majority Leader Mitch McConnell to delay a vote on the Better Care Reconciliation Act.