Rick Perlstein: The Grand Old Tea Party

A Democratic president begins a new term in the White House. Two years later, America votes a cadre of aggressive conservatives into Congress, loaded for bear. At first the Republican establishment, thrilled to have the Democrats on the run, puts its wariness about the fire-breathers aside. Within a few years, though, the new guys throw out all the old rules of consensus and compromise, and the establishment shows signs of buyer’s remorse. One of the new conservatives, a bulky, take-no-prisoners senator who sees socialist quislings everywhere, takes control of the agenda and threatens to drive the GOP into the ground.

But this is not 2008 or 2013. It’s the late 1940s and early 1950s, and the senator is not Ted Cruz but Joseph McCarthy.