The real hostile intelligence service
The real threat to the US is its own intelligence service. You know, the intelligence service that leaked that pissy-gate dossier against Trump. That one no doubt thought-up by the same people that concocted the sexed-up Saddam Hussein WMD dossier. Pissy-gate and other leaks, all designed to tie-up Trump in defending himself against scandal and get with the program.
That program being, expand the military presence in Eastern Europe. Use the blow-back from the Russian Federation as evidence of Russian 'aggression'. Provoke civil unrest in the middle east and then use such unrest as a pretext to invade Syria, Iraq, Afghanistan etc. Use the blow-back from such invasions as evidence of the threat from foreign terrorism, and use such evidence to suppress home-grown political activism. Use the pretext of all of the above to call for a massive increase in military spending. Use the pretext of national security to impose financial sanctions on foreign companies.