Out of the blocks early, U.S. Sen. Lindsey Graham on Thursday vowed to support President Donald Trump's 2020 re-election bid. The show of solidarity from the South Carolina Republican comes as many other members of the GOP are waiting to weigh in on their party leader. Graham, who has butted heads with the president in the past and also faced him as a 2016 GOP presidential primary challenger, fired off two tweets stating his support for the sitting president. In the post, Graham tagged Trump, an active social media user, when he tweeted: "As to the 2020 presidential race, I...