It’s not that last night’s contests in Idaho, Hawaii, Michigan and Mississsippi doomed Marco Rubio’s campaign; it’s that the four bad performances atop Rubio’s previous disappointments — New Hampshire, South Carolina, Nevada, and just about everywhere else not called Minnesota and Puerto Rico – have now created what feels like an insurmountable perception of defeat. Three Rubio-friendly conservative writers — Jen Rubin of the Washington Post, Dan McLaughlin of Red State, and Guy Benson of Townhall.com — contend it’s time for Rubio to quit the race and endorse Ted Cruz. Jen and Dan urge Rubio to strike the deal now...