Republican presidential front-runner Donald Trump has secured more than half of the delegates needed to win the nomination, but he will need to pick up his pace to clinch 1,237 delegates and avoid a contested convention. Trump’s strong performance in the Tuesday night primaries will make it tough for Sen. Ted Cruz (R-Texas) to catch him. He has secured 621 delegates, according to The Associated Press's projections as of 8:00 a.m. Wednesday, compared to 396 for Cruz and 138 for Ohio Gov. John Kasich. Those three men are now the only active GOP candidates. Sen. Marco Rubio (R-Fla.) suspended his...