They have the power to impeach the president and fire the senate. Can make new laws called bills when not approved. Can override the president if he doesn't agree to a new law by having at least 2/3 of the senate agree and the House of Representatives agree on the law to make it a law without the presidents confirmation. There are more powers, but I'm only 11 years old, so..... whatever!
got name because it was what I needed XD nevermind off topic.