They help with the balance of power between the executive and legeslative branch by using a system called checks and balances by limiting the power of each branch by having the other check it and vote upon it.For example if there was a new law that had to go into place and the president already vetod it but the Congress then voted against his veto by having 3/4 of them vote then it would go to the judical branch aka the Supreme Court and be decided if the law was constitutional or not this is just one way how checks and balance sor the balance of powee effect the judical and executive branch by limiting there power
