Congressional
Part of speech: adjective
Definition: of or pertaining to Congress or a congress
Example sentence: When I was elected, I was the youngest member of the Tennessee congressional delegation; now, I'm one of the oldest. In fact, I have members of my staff who weren't even born when I took office. That tells me it's time for a new chapter.
Legislative
Part of speech: adjective
Definition: Making, or having the power to make, a law or laws; lawmaking; - distinguished from executive: as, a legislative act, a legislative body.
Part of speech: noun
Definition: That branch of government which is responsible for making, or having the power to make, a law or laws.
Example sentence: People assume that the executive branch has more power than it actually has. Only the legislative branch can create the laws; the executive branch cannot create the laws. So, if the executive branch tries to create a branch one side or the other... you go back to the founders of the nation. They set up a system that ensures that it doesn't happen.