Mr. Trump has refused to participate in any debates so far.
Ms. Haley, a former ambassador to the United Nations under Mr. Trump and a former South Carolina governor, finished third in the Iowa caucuses on Monday just behind Mr. DeSantis, the Florida governor.
After failing to overtake Mr. DeSantis in Iowa, Ms. Haley faces heightened pressure in New Hampshire, where polls have shown her within striking distance of Mr. Trump, who dominated in Iowa.
She has accused Mr. Trump of ducking his opponents.
“He has nowhere left to hide,” Ms. Haley said in a statement on Tuesday.
Persons:
Trump, Haley, DeSantis, Vivek Ramaswamy, “, Ms, Donald Trump, Joe Biden, Haley “, ”, Mr
Organizations:
United Nations, Mr, Trump, Republican, CNN, Boeing
Locations:
South Carolina, Iowa, Florida, DeSantis, New Hampshire