Sen. Lindsey GrahamLindsey GrahamSchumer, Cardin to introduce legislation on Russia sanctions Graham says he will vote for Tillerson The Hill's 12:30 Report MORE (S.C.) is dropping out of the GOP race for the White House.
Graham announced his plans in a video message on Monday morning.
Graham had hoped his experience on national security — he is an ally of Sen. John McCain (R-Ariz.) and a member of the Armed Services Committee — might give some life to his campaign.
But he never gained traction in the crowded field. As of Monday, he was averaging 0.5 percent in the RealClearPolitics average of national polls and never scored higher than 2 percent in any major national poll throughout his campaign.
"I got into this race to put forward a plan to win a war we cannot afford to lose and turn back the tide of isolationism that was rising in our party," he said in the video.