Simplify the following text for a Grade 15 native English-speaking person.
Original: Costello , however , considers the parliament to be a forum in which he can consolidate his power , citing famous speeches by Winston Churchill and Abraham Lincoln ; the other members ruin this noble idea with their lack of discipline and ostentatious indifference .
Simplified: Whereas Costello thinks the parliament would be a forum in which he can strengthen his power , quoting from famous speeches by Winston Churchill and Abraham Lincoln , the other members ruin the idea because they have no discipline and feel indifferent .