Former US president Donald Trump cemented his position as the Republican Party’s all-but-certain nominee for November’s general election after sweeping the Super Tuesday primary contests. The results set the stage for a White House rematch between Trump and President Joe Biden, who as the first-term incumbent faces no real challengers for the Democratic Party’s nomination. Trump handily defeated his last remaining major challenger, Nikki Haley, in primaries held in Maine, Massachusetts, Virginia, North Carolina, Oklahoma, North Dakota, Minnesota, Alabama, Tennessee and Texas, according to proj…