By Jason Lange WASHINGTON (Reuters) -Some 51% percent of voters in New Hampshire’s Republican presidential primary contest consider themselves to be Republicans, down from 55% in the party’s 2016 contest, according to an exit poll conducted on Tuesday by Edison Research. The poll gathered responses from 2,192 voters in the Republican contest, and poll results were still being updated. * 43% of voters in the Republican contest – which was also open to voters who are not registered with any party – said they usually considered themselves as independents, largely unchanged from 42% in 2016. * 6% …