Yeah I took them over in my game. Right now the two world leaders are the US and France, but I can't go into any wars without my popularity dropping to nothing. Guess everybody is tired after I took over Russia and India And thanks, guess I should stop sending the Soviets aid!
Okay, when you invade France, just remain in the War Room. If you have to leave the War Room, press "zero" to freeze the timer. That way you can select other countries and make various talks with your allies.
Also there is a trick to restore your popularity with ease. First make sure the timer is frozen by pressing "0", then select Angola (Zaire-controlled) and go into the War Room. Then you select to "adjust troops levels." However do not increase or decrease the numbers. Instead just click "Do it". It will state that Angola has approved your request to deploy troops in their country as though you were making in initial deployment. Spam this many many times and when you feel you did enough, press "1" to get the game going again. Your popularity should immediatly start raising up very very quickly as people are pleased with your "deployments" to Angola. This tactic is one thing that helped me avoid impeachment during World War III despite the fact the conflict lasted more then one year.
Oh... do you control India or does Pakistan? I think you would be better off making sure Pakistan or any of your allies in the region for that matter are the ones to control India. If you have a saved game in place from just before invading India, you could revert to it. In order to assure your ally is the one to assume control, there are two things that most happen: They must help with the invasion and they must have more troops in the region then you. It is always a good idea to have a saved game in place right before the invasion, that way if an ally you want to join you in the war doesn't do it, you can revert to save and try again.
If you already started sending aid to the Soviets, don't bother cutting it now. You could only hurt your ethics.