Each clue describes a positive or negative story about a senator:Corker (positive)
The yellow and white square at the bottom is a Chutes and Ladders board. In Chutes and Ladders, squares are numbered in alternating directions along rows from 1 at the bottom left to 100 at the top left. If you fill the senators into the squares from least senior in square 1 (Ayotte) to most senior in square 100 (Inouye), the squares containing numbers correspond to the clued senators above. Senators with positive clues are at the bottom of ladders; senators with negative clues are at the top of chutes.
Take the senator at the other end of each chute or ladder in the order above and index into his/her last name using the corresponding number to get:ISakson
That spells out SO YOU CALL IN GAMMA RAY, so you call in GAMMA RAY.