Marco Rubio, John McCain win Florida, Arizona Senate primaries
U.S. Republican Sen. Marco Rubio and Democratic U.S. Rep. Patrick Murphy each easily won their Senate primaries Tuesday, setting up a November showdown that's guaranteed to be nasty as each party grapples for a majority in the chamber.
Trump's name loomed large over ballots in both states

Republicans U.S. Sen. Marco Rubio and U.S. Sen. John McCain both won their primary challenges in their states of Florida and Arizona Tuesday night.
McCain beat back a primary challenge Tuesday from a Republican tea party activist to win the right to seek a sixth Senate term in November, clearing an important hurdle in a race that was inundated with questions about GOP presidential candidate Donald Trump.