June 9, 2026 – Maine, South Carolina primary election, Graham Platner will win race, CNN projects

In his primary campaign, Platner emphasized his background as a Marine and small-business owner, arguing that lived experience outside Washington would help him better represent Maine voters. His campaign also received backing from prominent progressive leaders, helping consolidate the left wing of the Democratic Party behind his candidacy.

The Maine race is now expected to be one of the most competitive Senate contests in the 2026 midterm cycle, with Democrats aiming to unseat longtime Republican Sen. Susan Collins in a closely divided U.S. Senate.

South Carolina primary results also take shape

Meanwhile, in South Carolina, voters participated in a series of primary elections for federal and statewide offices, including the U.S. Senate and House races.

Republican Sen. Lindsey Graham is projected to advance toward another general election campaign, as the state continues its long-standing Republican dominance in statewide contests. Democrats selected challengers in several races, including efforts to contest entrenched GOP incumbents across the ballot.

South Carolina’s primaries are part of a broader national election cycle that includes races for governor, Congress, and state legislative offices. While Republicans remain heavily favored statewide, Democrats have expanded their candidate field in 2026, fielding contenders in all legislative districts for the first time in decades.