U.S. Sen. Jeff Sessions sought Saturday to convince Texas Republicans that Donald Trump is the conservative leader needed to change Washington. “The American people are not happy,” the Alabama Republican told delegates at the state GOP convention in Dallas. “They are looking for something different.” Session said Trump would properly overhaul the nation’s immigration system and secure the southern border. “He’s going to build a wall to ensure that,” Sessions said. Sessions said Trump, as president, would appoint conservative justices to the Supreme Court, reverse bad trade deals and rebuild the military. “Donald Trump believes in a strong national defense,”...