Doesn't matter if it was the embarrassing tottering of an elderly man, or if it was a carefully practiced Jimmy Stewart folksy stammer, or something in between..
He's getting covered, and more importantly, quoted, over and over. And it was of sufficient interest, either to bash him, praise him, or simply parade him as a curiosity, it's making it past the usual gatekeepers in the MSM who normally do all they can to quash the conservative message.