The phrase "baseless attacks" means criticism or accusations that are not supported by any evidence or facts. It refers to unjustified and unsubstantiated claims made against someone or something. Full definition
«There will be no letters of support from New Windsor residents who recall Dubaldi as mastermind of baseless attacks on candidates Chris Eachus, a respected NFA teacher he accused of supporting child molesters, or Diane Newlander, who wanted a dog park, or Bonnie Brennan, a respected international civil rights attorney and domestic abuse victim he accused of being a criminal.» (ocnydems.com)
Each politician painted BPI as the helpless victim of baseless attacks, as Texas Governor Rick Perry said sadly, «through no fault of their own.» (eatdrinkpolitics.com)
Peter Kauffmann, a spokesman for Cuomo's campaign and the Democratic State Committee, offered this response: «This is yet another in a string of pathetic, baseless attacks by a flailing candidate. (politico.com)