Sentence 1: Woo wasn't happy about the way the mayor was doing things. 
 Sentence 3: Woo campaigned on his integrity and reputation as an honest person 
 Sentence 4:  His opponent ran a smear campaign and ran childish ads 
 Sentence 5:  Woo lost to his opponent by a very large margin 
 Option 1: He decided he won't vote for him. 
 Option 2: He decided he'd run for the office of mayor.