Republicans who want their party (or at least the foundational ideas of American conservatism) to survive the current crisis should do as disillusioned Whigs did in 1854.
Republicans understandably enjoy claiming Abraham Lincoln as one of their own. After all, he is arguably the greatest American President (Trump’s interesting claims of that distinction aside). But few Americans know that Lincoln had only been a Republican for seven years when he assumed the Presidency in 1861. Before that, he was a Whig.