Most politicians follow the donations, money, favors and the same theme of  "you pat my back" and "I pat yours."
Ms. Tulsi is in a league of her own...she's definitely not a puppet nor follower and stands up true to her beliefs.
Let us remember the words of Major General Smedley D. Butler: 

WAR is a racket. It always has been.

It is possibly the oldest, easily the most profitable, surely the most vicious. It is the only one international in scope. It is the only one in which the profits are reckoned in dollars and the losses in lives.

A racket is best described, I believe, as something that is not what it seems to the majority of the people. Only a small "inside" group knows what it is about. It is conducted for the benefit of the very few, at the expense of the very many. Out of war a few people make huge fortunes.