Trump seeks control of Republican primary in New Hampshire against rival Haley

Ms Haley has dedicated significant time and financial resources to New Hampshire, hoping to appeal to its famously independent-minded electorate.

Donald Trump’s allies are already pressuring former UN ambassador Nikki Haley to leave the race (Matt Rourke/AP)

Donald Trump is aiming for a commanding victory in New Hampshire, securing a sweep of the first two Republican primary races that would make a November rematch with US president Joe Biden look more likely than ever.

The biggest question is whether Mr Trump’s last major rival, former UN ambassador Nikki Haley, will be able to eat into his margin — or pull off an upset outright.