The Democrats now have a 55-44 advantage in the 100-member Senate, with the result of the US Senate race in Alaska yet to be determined.

Mississippi Democratic Senator-elect Scott Colom talks on the phone at his campaign office in Jackson, Mississippi on Nov 11, 2026. (Photo: AP/Ellen Schmidt)

Mississippi Democratic Senator-elect Scott Colom talks on the phone at his campaign office in Jackson, Mississippi on Nov 11, 2026. (Photo: AP/Ellen Schmidt)

WASHINGTON: Democratic challenger Scott Colom defeated incumbent Republican Cindy Hyde-Smith in the Mississippi election for the US Senate, media projected on Wednesday (Nov 11), making him the Southern state's first Black senator since the Reconstruction era that followed the US Civil War.

The result was a stunning upset in the heavily Republican state and expanded on the national drubbing the Democrats delivered to President Donald Trump's Republicans in the Nov 3 midterm elections.

The Mississippi victory gives the Democrats a 55-44 advantage in the 100-member Senate, with the winner in one Senate race from last week's election - in Alaska - yet to be determined. The Democrats have also gained 41 seats in the House of Representatives so far, holding an advantage of 254 to 168 with 13 races yet to be called.

In losing control of both chambers, Trump faces a Democratic-controlled Congress for the first time in either of his two terms, presenting the opposition party a chance to block highly partisan legislation and investigate Trump's administration.

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The Mississippi Senate race was one of the final outstanding races to be called since last week's elections. Mississippi election officials have spent more than a week counting ballots in a race that was so tight that Colom at times led by only a few dozen votes. The latest media-tabulated results showed him ahead by more than 4,500 votes, or 0.5 percentage points.