SENATE IMPEACHMENT TRIAL, AND A BATTLE OVER WHETHER FORMER

NATIONAL SECURITY ADVISOR JOHN BOLTON WILL TESTIFY.

♪ ♪

>> HELLO, AND WELCOME TO "AMERICAN WITNESS WARRIOR."

MITCH MCCONNELL IS CONSIDERING LETTING WITNESSES TESTIFY, BUT

ONLY IF THEY CAN MAKE IT THROUGH THE OBSTACLE COURSE.

>> LET'S GO DOWN TO THE FLOOR NOW AND WATCH OUR FIRST

CONTESTANT, JOHN BOLTON!

BOLTON HAS A LOT OF FANS HERE.

>> FOR A 71-YEAR-OLD MAN, LOOKS LIKE HE'S GOTTEN INTO PRETTY

GREAT SHAPE.

BOLTON STARTING OFF WELL ON THE "SHUT YOUR MOUTH" STEPS.

>> THAT MUST BE MAKING THE PRESIDENT SWEAT.

>> BOLTON HAS DONE IT!

HE'S THROUGH THE FIRST OBSTACLE.

>> THE "KEEP-MUM" SWING, INTO THE "HUSH" BAG.

LET'S SEE IF HE CAN DO IT.

>> AND HE DOES IT!

HE IS ON FIRE!

>> THE BOLTON FANS ARE LOSING IT!

>> AND NOW A QUICK LEAP ON THE "DON'T BE A BACKSTABBER" WALL.

HE IS SO CLOSE TO TESTIFYING!

HE IS GOING AROUND... HANG ON, JOHN!

AND, HE FALLS INTO THE ELECTRIFIED POOL!

TOO BAD.

LOOKS LIKE MCCONNELL'S HAPPY.

>> ANNOUNCER: IT'S "THE LATE SHOW WITH STEPHEN COLBERT."