It hands the Democrats a talking point, because the definition of “treason” is set forth in the Constitution, and that is not it. Sedition, subversion, corruption, yes. But even if they were colluding with the Ukraine, Ukraine is not an enemy of the United States, and they are not taking up arms against the US, giving aid and comfort to its enemies, or making common cause with them. This can backfire.
“It hands the Democrats a talking point...”
That’s the idea: Force the Democrats to repeatedly use the word in the media. Treason will replace Collusion as the subject of talking points.