“Sen. Ayotte brings invaluable insight to our conference on issues that affect American families. Firmly committed to getting our fiscal house in order, she will perform a critical role as a member of the Senate Republican Leadership team,” McConnell said in a statement.

Ayotte will serve alongside Sen. Bob CorkerRobert (Bob) Phillips CorkerFormer Dem Tenn. gov to launch Senate bid: report McConnell 'almost certain' GOP will pass tax reform Former New Mexico gov: Trump's foreign policy is getting 'criticized by everybody' MORE (R-Tenn.) in the informal leadership post, and replaces Sen. Kay Bailey Hutchison (R-Texas), who retired this year.

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Ayotte and Corker's positions differ from the Senate's official Republican leadership, which includes Whip John CornynJohn CornynMcConnell names Senate GOP tax conferees Air Force makes criminal reporting changes after Texas massacre We need a better pathway for allowing civilians to move guns across state lines MORE (Texas), Conference Chairman John ThuneJohn Randolph ThuneMcConnell names Senate GOP tax conferees Overnight Health Care: 3.6M signed up for ObamaCare in first month | Ryan pledges 'entitlement reform' next year | Dems push for more money to fight opioids Dems push for more money for opioid fight MORE (S.D.) and Policy Committee Chairman John BarrassoJohn Anthony BarrassoScalise: House, Senate ‘pretty close’ on tax bill Top GOP senator: House and Senate 'not that far apart' on tax bill Sunday shows preview: Republicans take victory lap on taxes MORE (Wy.). Sen. Roy BluntRoy Dean BluntDems push for more money for opioid fight Trump asked Senate Republicans to end Russia election interference investigation: report An overlooked solution to the opioid epidemic MORE (Mo.) also serves as the Conference vice chairman, and Sen. Jerry MoranGerald (Jerry) MoranMcConnell works to salvage tax bill GOP in furious push for tax-reform votes Overnight Tech: Lawmakers want answers on Uber breach | Justices divided in patent case | Tech makes plea for net neutrality on Cyber Monday MORE (Kan.) chairs the National Republican Senatorial Committee.

Ayotte has taken an increasingly prominent role in the Senate, partially propelled by her surrogate work for Mitt Romney's campaign last fall. She was reportedly considered as a candidate for Romney's running mate before the former Massachusetts governor selected Rep. Paul RyanPaul Davis RyanMcConnell names Senate GOP tax conferees House Republican: 'I worry about both sides' of the aisle on DACA Overnight Health Care: 3.6M signed up for ObamaCare in first month | Ryan pledges 'entitlement reform' next year | Dems push for more money to fight opioids MORE (R-Wis.).

The New Hampshire lawmaker also made headlines late last year when she joined Sens. John McCainJohn Sidney McCainGOP strategist donates to Alabama Democrat Meghan McCain knocks Bannon: 'Who the hell are you' to criticize Romney? Dems demand Tillerson end State hiring freeze, consult with Congress MORE (R-Ariz.) and Lindsey GrahamLindsey Olin GrahamGOP and Dems bitterly divided by immigration We are running out of time to protect Dreamers US trade deficit rises on record imports from China MORE (R-S.C.) in questioning the qualifications of U.S. Ambassador to the United Nations Susan Rice. Rice was seen as President Obama's top choice to replace Hillary ClintonHillary Diane Rodham ClintonGrassley blasts Democrats over unwillingness to probe Clinton GOP lawmakers cite new allegations of political bias in FBI Top intel Dem: Trump Jr. refused to answer questions about Trump Tower discussions with father MORE as secretary of State in his second term. 

Rice met directly with Ayotte but was unable to win her favor, amid GOP criticism of the ambassador's handling of the September attack on the U.S. Consulate in Benghazi, Libya. Obama later nominated Sen. John KerryJohn Forbes KerryLobbying world Kerry: Trump not pursuing 'smart' or 'clever' plan on North Korea Tillerson will not send high-ranking delegation to India with Ivanka Trump: report MORE (D-Mass.) to the position.