YEREVAN – Thousands of protesters converged on the parliament building in Armenia's capital Wednesday to push for the resignation of the ex-Soviet nation's prime minister over his handling of the fighting with Azerbaijan over Nagorno-Karabakh.Nikol Pashinyan's opponents are angry at a peace deal that ended six weeks of fighting over the separatist region but saw Azerbaijan take over wide areas that have been controlled by Armenian forces for more than a quarter-century.Armenia's opposition parties gave Pashinyan an ultimatum to resign by Tuesday, but he has ignored the demand, defending the peace deal as a bitter but necessary move that prevented Azerbaijan from overrunning the entire Nagorno-Karabakh region.About 15,000 protesters marched.