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DeSantis downplays significance of Gov. Sununu's New Hampshire endorsement of Haley: 'So many problems'

Will Sununu endorsement of Haley make a dent in Trump's massive lead in GOP presidential primary race?

New Hampshire Gov. Chris Sununu expected to endorse Nikki Haley for president

CNN's Iowa GOP debate uncertain as Nikki Haley noncommittal, Christie and Ramaswamy unlikely to qualify

Trump holds massive lead in Iowa 5 weeks from caucuses that kick off GOP race: poll

Will Trump’s unprecedented general election campaign style work during primary season?

Ron DeSantis lays out plan to 'engage' Mexican cartel 'terrorist organizations' as Casey dings Haley

DeSantis, Haley spar over support for bathroom bills during their tenures as governor: 'You are lying'

Name-calling, personal jabs round out top 5 moments from the fiery Republican presidential debate in Alabama

Who were the winners and losers in the fourth Republican presidential debate? Pundits name their picks