As has been proven in this country many times if you want leverage on someone you set them up and video tape the results.
To test that you now have control, maybe you send a few hundred more mechanized troops to a border dispute and see what the response is. Or you could fly aircraft dangerously close to enemy aircraft. Or you could sail an Intelligence gathering ship within miles of a critical military installation. Wait for the government response. No response? Ratchet up the leverage and make the blackmailed person prove he will not act defensively.
Let's ok allowing billions of dollars flow into the development of Russian oil and gas reserves. Then we won't have to be embarrassed by the "dossier" content being revealed.