sounds like you've got a budding revolution...
From the looks of things (at least what you've posted anyway) the president's actions have caused the people to go so much against him that he's been forced to use power tactics to try and muscle the population back under control. My guess is that if he wins the third time it'll be the kickoff to a full scale civil war/revolution
And judging from the fact you can't toss him from office with a vote, you guys probably should draw up somthing that allows you to do that, AND attaches term limits to the leaders stay in office.
I'm wondering if you have any other branches of the government that aren't subordinate to the prime minister. If so the easiest way to find a way out of this is to use that branch to pressure the pm into resigning, or to be the figurehead/leader of the rebel side.