Gideon v Wainwright guaranteed that all defendants are entitled to an attorney, regardless of the severity of the charge. You can waive this right if you do wish, but all people can have one, either your own private lawyer, or a court-appointed one.
Judicial branch of government
1) the Constitution, federal laws made pursuant to it, and treaties made under its authority,
2) when state constitutions or laws passed by state legislatures or the national Congress are found to conflict with the federal Constitution, they have no force.
3) Yes, all treaties are the “supreme law of the land”
4) The congress can shut down the government.