Hillary Clinton will headline a Manhattan fundraiser Monday night for mayoral candidate Bill de Blasio, contributing her political clout to the Democratic front-runner's campaign and underscoring City Hall's significance on the national stage.

The Roosevelt Hotel event, with the price of cocktail reception tickets starting at $1,000 and host committee chairs committed to raising $25,000 each, is among Clinton's first partisan forays since leaving her secretary of state post in February. Clinton, weighing a 2016 presidential run, also has stumped for Virginia gubernatorial candidate Terry McAuliffe.

To give less-affluent supporters entry to the event, de Blasio's campaign raffled off two tickets.

De Blasio's wife, Chirlane McCray, in an email Saturday to supporters, said Clinton is "an inspiration to women and girls everywhere, and an example of leadership and grace for us all."

De Blasio holds a 3-1 lead in the polls over Republican rival Joe Lhota two weeks before the Nov. 5 election.

Clinton and her husband, former President Bill Clinton, last month endorsed de Blasio, calling him a "friend." The public advocate, who managed Hillary Clinton's successful U.S. Senate bid in 2000, in turn, described the couple's support as "humbling."

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Since winning the Sept. 10 primary, de Blasio has cut back on his public schedule in favor of private fundraisers. He raised about $628,000 in the most recent two-week filing period, compared with Lhota's $280,000, according to Campaign Finance Board records.

Bill Clinton, meanwhile, is scheduled to host a fundraiser Wednesday in Great Neck for Nassau County executive candidate Thomas Suozzi.