i will give the brainliest answer to the best answer.

two u. s. senators are guests on a tv news interview program. one is introduced as “senator susan hartford, conservative leader,” and the other is introduced as “senator howard williams, focus of an ongoing corruption investigation.”
these introductions indicate
bias in favor of senator williams
symbolism in favor of senator williams
bias in favor of senator hartford
symbolism in favor of senator hartman

It is pretty simple to tell when someone is "bias" towards something (if they are introducing it in a positive light) and when someone is "bias" against something (if they are introducing it in a negative light.
Here, Senator Hartford is being introduced as a leader (an important and favorable position-positive) and Senator Williams is introduced with the tagline of an investigation into some corruption that he may or may not be involved in (negative). Therefore, the bias is in favor of Senator Hartford. 

Militarism is the answer.