Voting is expected to take place throughout the state from 7:00 a.m. until 8:00 p.m . In the open primary , candidates must meet a threshold of 15 percent in the eastern and western districts of the state ( roughly coterminous with the boundaries of the state 's 2 congressional districts after the 1980 redistricting ) in order to be considered viable . The 16 pledged delegates to the 2020 Democratic National Convention will be allocated proportionally on the basis of the results of the primary . Of the 16 pledged delegates , between 5 and 6 are allocated to the eastern and western districts and another 2 are allocated to party leaders and elected officials ( PLEO delegates ) , in addition to 3 at-large pledged delegates . These delegate totals do not account for pledged delegate bonuses or penalties from timing or clustering
2020 Democratic National Convention
2020 Democratic National Convention
2020 Montana Democratic primary