The Russian game is to sow discontent, to “heighten contradictions” as Marxist theory puts it. They’re happiest when Americans are all hating each other.
In terms of our presidential elections, the Russians are happiest when we have a pathetically weak on defense, accommodating their every wish on such critical important matters as missile defense, nukes (New Start treaty and the Iran nuke deal, Uranium-One deal, etc, etc, administration in power.