The double jeopardy clause is one of the foundations of our criminal justice system. The Fifth Amendment guarantees that you can't be prosecuted twice for the same offense. If you're charged with a crime and a jury finds you not guilty, the prosecution doesn't get another shot. Without this protection, the prosecution could simply keep coming after you, and your right to a fair trial would be rendered worthless.
In a case that spans decades, a black Mississippi man was convicted four times for the 1996 murders of four furniture store employees - three white, one black. Four times, he was sentenced to death.
It's one of the biggest marks a president can leave on the judiciary: a Supreme Court nomination. And Trump has a narrow window of time to get his pick - federal appellate judge Brett Kavanaugh - confirmed. The Supreme Court term begins October 1st, and the looming midterm elections threaten to disrupt the GOP's dominance in the Senate.