Newly appointed Sen. Kirsten Gillibrand (D) may still be on shaky ground with some liberal groups in the Empire State, but she is being embraced by her fellow Democratic women in the Senate.All 12 of Gillibrand’s Democratic female colleagues are hosting a cocktail hour fundraiser for her on April 29 at Louisiana Sen. Mary Landrieu’s Capitol Hill townhouse. Ticket prices start at $500.Gillibrand was beginning her second term in the House when she was appointed to replace now-Secretary of State Hillary Rodham Clinton in the Senate in late January. At least a half-dozen Democrats, including New York Reps. Steve Israel, Carolyn Maloney and Carolyn McCarthy, are contemplating challenging her in next year’s Democratic primary.