But Clooney's movie is strictly factoid.

Clooney gets it wrong about McCarthyist menace - theaustralian.news.com.au - Frank Devine

"The actors are solicitously escorted by a script. McCarthy is jerked on screen in short takes that show him at his most abominable. In one prolonged sequence he hectors, gosh, a little old black lady.
Rarely since the emperor Commodus established his enviable win-loss record by fighting gladiators armed with wooden swords has the fix been so comprehensively in.
But Clooney still can't resist egregious fakery to make assurance doubly sure.
When Murrow went to air on March 9, 1954, the army, goaded by McCarthy's slanders, was already making legal preparations for a showdown before another Senate committee. These hearings, which began on April 22, 1954, ruined McCarthy. The Senate buried him by censure in December. In other words, a democratic system spat McCarthyism out. Clooney's implication that it is threateningly alive in the 21st century should be a warning to the Left against entrusting messages to Hollywood boofheads."