iraq's military has inflicted heavy losses on isis fighters. including embedded journalists reporting explosions and heavy gunfire. this could take weeks maybe even months. it's iraq's second-largest city. the last wee maremaining isis stronghold in the country. us defense secretary ash carter calls it a decisive moment to defeat the terror group. take you live to the front lines of the battle this hour. the other big story we're following right now, presidential politics here in the united states. less than 22 days and counting until election day, and donald trump is wrapping up his claim that the system is rigged. earlier this morning he tweeted this -- of course there is large-scale voter fraud happening on and before election day. why do republican leaders deny what is going on? so naive. trump has presented no evidence of voter fraud. here's what his campaign manager told our jason carroll just a little while ago.