As I theorized earlier in this thread, Hillary Clinton is emerging as a late shoo-in for the Democrat nomination. Her recent attacks on Tulsi Gabbard clearly paint a picture of one maneuvering to snatch the Democrat primaries.
There isn't a snowflakes chance in hell of that happening.
But while you are wrong, she is trying to deal herself back into the national narrative as an elder in the Dem party.
But she was never politically adroit, and this is likely to be a good example of her political clumsiness. Russia has backed Jill Stein for years, that is well documented. Putin may be shifting to Gabbards, but political attacks are not part of an elder statesmans brief. An elder needs to guide gently, not go on the attack.
In any case, for most people, she's fallen off the radar, and moves like this won't rehabilitate her standing in the party. Unless there this is some sort of game for political insiders, which is a possibility.
In that case, she's angling for an ambassadorship or cabinet position in a Biden presidency.