Simplify the following text for a Grade 6 native English-speaking person.
Original: Pauline Marois also said she was going to try to become leader , but Duceppe changed his mind on the 12th leaving Marois the only candidate .
Simplified: He was followed the same day by Pauline Marois . In a surprise move , Duceppe withdrew on the 12th - leaving Marois the only declared candidate .