Ayotte won the seat of retiring Sen. Judd Gregg (R-N.H.) last year with the support of prominent conservatives such as Sen. John McCainJohn Sidney McCainRubio asks Army to kick out West Point grad with pro-communist posts The VA's woes cannot be pinned on any singular administration Overnight Defense: Mattis offers support for Iran deal | McCain blocks nominees over Afghanistan strategy | Trump, Tillerson spilt raises new questions about N. Korea policy MORE (R-Ariz.), Sarah Palin, Mitt Romney, Haley Barbour and Rick Santorum. Ayotte, 42, is the youngest woman in the Senate.

Ayotte had harsh words for Congress as she endorsed a balanced budget amendment. 

“Hollow words paying lip service to fiscal responsibility have been used by too many in Congress for far too long,” Ayotte said in endorsing a constitutional amendment that would force the government to balance its budget every year. “Our founding fathers could not have anticipated how unwilling members of Congress would be to actually pass a balanced budget and make fiscally responsible decisions.”

Ayotte said she is determined to dig the government out of its debt.

"The debt that we owe is so much more than numbers — this is about us — who we are as Americans — and what kind of country we want to leave behind," Ayotte said.