Through the system of checks and balances, the three branches of government check on one another to make sure that no single branch has more power than the other. The executive branch can veto bills that the legislative branch creates. However, the legislative branch can override the veto with 2/3 of majority vote. They can also have the power to impeach the president. The executive branch also has the power to pardon the judicial branch and can appoint judges. The judicial branch can declare presidential acts unconstitutional, and can even declare bills (laws) that the executive branch creates unconstitutional. The power that the legislative branch has over the judicial branch is that they can approve federal judges.