Jeff Sessions on Sunday became the first U.S. senator to endorse Donald Trump for president. “We need to make America great again,” the Alabama Republican announced here at a Trump rally, citing Trump’s campaign slogan. “I am pleased to endorse Donald Trump for the presidency of the United States.” Trump pointed out at the rally that Sunday’s announcement was the first time that Sessions has endorsed a candidate in a presidential campaign. “I told Donald Trump this isn’t a campaign, this is a movement,” Sessions said at the rally. “The American people are not happy with their government.” Sessions’ endorsement...