New Delhi, May 19 -- Voters across six US states - Kentucky, Pennsylvania, Georgia, Alabama, Oregon, and Idaho - are heading to the polls in critical primary elections that could influence control of Congress, test President Donald Trump's dominance over the Republican Party, and reshape the political landscape ahead of the 2026 midterms and the 2028 presidential race.

The elections feature high-profile battles involving Trump-backed candidates, intra-party divisions, redistricting disputes and emerging national personalities.

Kentucky's Republican primary is among the most closely watched contests on Tuesday as Representative Thomas Massie faces a direct challenge from Trump-backed newcomer Ed Gallrein.

Massie has frequently broken wi...