13) Lindsey Graham (R)
Lindsey Graham is a senator from South Carolina known for his hawkish positions on national defense and his close friendship and alliance with Senator John McCain. He’s currently far behind the front-runners in the polls, but is staying in the race and is one of the most pragmatic of the Republican candidates. His recent strong debate performances have prompted talk of a Secretary of Defense position for him if a Republican were to win the White House. Mr. Graham’s net worth is estimated at $1.5 million.