Tajikistan's President Emomali Rakhmon won a crushing victory in presidential elections to secure a fourth term at the helm of the poorest state in the former Soviet Union, the election commission said Thursday. Rakhmon won 83.6 percent in Wednesday's elections against five also-ran candidates, full results showed, an improvement even on his showing in the 2006 polls when he won 79.3 percent. With the presidential mandate now seven years, he is due to stay in power until 2020.