Maybe the US president and his nearest followers have acted so clumsy that he is compromised to such an extent that in reality he will be a lame duck in the time to come. Building a real power base takes more than an election victory and a few decrees. Time will show if Trump can manage this after all.
In the meanwhile he may be reduced to a powerless front figure for the Republican party. After having returned them to power he is still allowed to shout and tweet insults. It may help to satisfy the desperado voters. But that may be all he can do.
Thus the radicalized, right wing extremist, puritan and populist republican fractions could prevail. Concerning the Middle East the Republican right wing will support Mr. Trump. This is certainly no good news. Concerning Russia the anti-Putin hawks could overrule the opposite policies of the president.
So, for Russia the main advantage of the new presidency may evaporate. But the other advantage may still be real. That is the destabilization of the United States because of the declined political system. Populism, a radicalization of the two parties, mutual obstruction and contradictory incompatible legislations shifting with elections.