Ted Cruz may have won both Utah’s Republican presidential primary and an endorsement from ex-Florida Gov. Jeb Bush, but the Wednesday’s Quinnipiac national poll indicates that nearly half of the supporters of rival candidate John Kasich would vote for Donald Trump, not Ted Cruz, as their second choice, and more than half of Cruz’s backers would do the same if he dropped out, reports Politico.

• Bloomberg: Jeb Backs Cruz, Says ‘Vulgar’ Trump Divides Party, Helps Democrats
• Newsmax: Newt Gingrich: I’m Not Interested in a Trump WH Position
• AP: Cruz Embraces Bush’s Endorsement, Says He Can Defeat Clinton
• Politico: Trump: Torture Could Have Prevented the Brussels Attacks
• The Hill: Republicans Demand Shift in Obama’s ISIS Strategy

Tuesday’s terrorist attacks on the Brussels airport and subway system have spurred governments in Europe and beyond to tighten security at airports, on subways, at the borders and on city streets. In New York City the NYPD announced increased security in trains, bridges, tunnels, subway stations and landmarks, reports NBC.  GOP presidential front-runner Donald Trump said he would have closed America’s borders “until we figure out what’s going on,” according to The Hill.

•  The Hill: Trump Holds Double-Digit Lead In 2 National Polls
•  WaPo: Obama to Address The Cuban Nation In Historic Havana Visit
•  Newsmax: Ted Cruz Blasts ‘Disastrous’ Cuba Trip as Obama Poses at Che Guevara Mural
•  Politico: Trump’s Foreign Policy Team Baffles GOP Experts
•  WashTimes: Trump On Track to Win Barely Enough Delegates For GOP Nomination

At the start of his historic three-day visit to the island of Cuba, President Barack Obama said that “change would happen” in Cuba and that Cuban President Raul Castro (who he will meet later on Monday) understood that, reports the BBC.   However, hours before Obama landed in Cuba on Sunday, Cuban authorities arrested more than 50 dissidents marching to demand improved human rights, according to USA Today.

• Politico: Trump, Priebus Clash Over Delegate Process
• AP: Judge Wants US to Protect Trump Associate’s Secret History
• WashTimes: History Suggests Brokered Convention Will Doom Donald Trump
• The Hill: Soros-Linked Jewish PAC Will Intervene In Senate Races For First Time
• WashTimes: Republican Senators Skipping Recess To Block Obama Supreme Court Appointment