Primaries will determine party candidates in November race to control the US Congress, giving an early window into voter sentiment.

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The 2026 primary season, in which voters in the United States determine which candidates will represent the major Republican and Democratic political parties in the November midterm elections, has begun in earnest with votes in Texas, North Carolina and Arkansas.

The polls kicked off just four days after the US and Israel launched attacks on Iran, sparking a regional war that has seen Iran launch retaliatory strikes across the Middle East. The fighting has so far left hundreds dead, including at least 787 in Iran, six members of the US military, and several civilians across the Gulf.