Michigan state senator Mallory McMorrow has suspended her campaign for the Democratic nomination for the United States Senate seat in Michigan, reducing the primary contest to two remaining candidates ahead of the 4 August vote.

McMorrow announced her decision in a video released on Sunday, saying she was ending her campaign with approximately one month remaining before Democratic voters choose their nominee.Her departure follows a period in which polling suggested that her support had weakened after initially being part of a competitive three-way race.

Earlier surveys throughout the winter and spring had shown McMorrow, Representative Haley Stevens and former public health official Abdul El-Sayed running closely together, making the primary one of the most closely watched Democratic contests in the state.McMorrow had also secured endorsements from several prominent Democratic senators, including Elizabeth Warren, Chris Murphy and Martin Heinrich.Despite these high-profile endorsements, more recent polls indicated that her campaign had lost momentum over the summer.

Following her announcement, both of her remaining opponents, Haley Stevens and Abdul El-Sayed, issued statements thanking McMorrow for her campaign and recognising her contribution to the race.

Her withdrawal leaves Democratic voters to choose between Stevens and El-Sayed in the primary election, with the winner advancing to the general election for the Michigan U.S.Senate seat.The article notes that this is a developing story and that further information is expected as the campaign continues.