Because they can't fight a ground war. You think American would just happily accept Trump's assassination and move on? And Russia would happily accept Putin's? There'd be terrible war, and since America would overwhelm Russia, the Russians would use their only ace in the hole and nuke America as they know America will show no quarter and they'd rather take as many with them before they go. You, and just almost all commenters in this thread, seem to underestimate the retardedness of the saber-rattling idiots that step in to fight to fill the void of the delusional dead leaders.

I'm done trying to talk sense in this thread. If you and every other pussy in this thread is as tough as their comments are, I implore you to head to Alaska and take these asshole leaders out. Either way, the world will be better off as there's be fewer idiots left to dumb down our species.