Someone has either tied President Trump's hands or he finally learned to restrain himself, because throughout former FBI Director James Comey's testimony before the Senate Intelligence Committee on Thursday, his Twitter account has remained silent.

You heard that right. No tweets about tapes. No tweets about covfefe. Nothing. As of this writing, President Trump last tweeted the following:

With their oxygen tanks depleted, some on the left have resorted to trolling the President on Twitter hoping to prod him into firing off a big one for them to cackle at. Enter actor Chris Evans, a.k.a Captain America:

An hour and half later, and nope, still no tweets. This looks like a rational theory: