He was more of a democratic, which the Whig party didn't liked since they looked out only for the high class and not the middle or low class.
The Whigs disliked John Tyler because during his presidency, he vetoed many bills from then. He was also known for impriving the relationship between Great Britain and the United States.
He was William Henry Harrison's Vice President but Harrison died 32 days later after being chosen for president because of pneumonia.