Not too sure about that one. If the corporate-government hegemony that controls the US might think that keeping France leftist would allow them to maintain the most control over France, as well as make the most money off of France. If a revolution in France that threatens to overturn the Leftist government happens then the US might intervene and try to stop the revolutionaries. The US has a long history of intervening in other countries for the sake of profit, be it through the CIA or sending in the marines or dropping bombs or training up another nation's soldiers or whatever. Parts of the US military engaged in war in Syria, even though that was treason because neither President Trump or Congress had agreed to do so. And ofcourse, the media will cover it up/push it to the back of the papers/or spin it.