At some point, the good of the country must override the good of the political party. I do not think Donald Trump is competent or qualified to have his hands anywhere near the nuclear football.
His policy prescriptions are those of a simpleton trying to sound adult and include a whole host of ideas that have failed throughout the world, including protectionism and transactionalism in foreign policy.
If Trump is nominated, Republicans working to purge him and his manner from public life will reap the considerable satisfaction of preserving the identity of their 162-year-old party while working to see that they forgo only four years of the enjoyment of executive power. Six times since 1945 a party has tried, and five times failed, to secure a third consecutive presidential term. The one success — the Republicans’ 1988 election of George H.W. Bush — produced a one-term president. If Clinton gives her party its first 12 consecutive White House years since 1945, Republicans can help Nebraska Sen. Ben Sasse, or someone else who has honorably recoiled from Trump, confine her to a single term.