There is another coup...... a coup de main
He should worry
Obama has worked very hard to remake the military and replace much of the leadership. He has half of the population enthralled with him and will never back his forceful removal. The only possibility as you indicate would be a fast counter coup and then the need to arrest the Obamabots in government and suppress the leftist terrorists in the general population. It will be bloody, but what is now happening is the death of the country. There is no good outcome left for the country.
In English it means a sudden strike, usually a military attack requiring surprise.
In French it means a helping hand as in "Donner un coup de main à quelqu'un" - To give someone a helping hand.
"Ceterum censeo 0bama esse delendam."
Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)