ily and his constituents," Heller said. A senior Democratic National Committee official told Fox News that Weiner's refusal to resign is "unacceptable." "His constituents and his colleagues need finality and his district needs representation," the official said. "The die is cast -- he needs to move on."  In a series of statements, Democratic leaders said the best decision for Weiner was to step down. House Democratic leader Nancy Pelosi of California said Weiner has the "recognition that he needs help." "I urge Congressman Weiner to seek that help without the pressures of being a Member of Congress," she said in a statement. National party chairman Debbie Wasserman Schultz said Weiner's behavior is "indefensible" and his role in Congress is "untenable." The Florida congresswoman said "this sordid affair has become an unacceptable distraction" for everyone. Democratic Congressional Campaign Committee Chairman Steve Israel said Weiner's "inappropriate behavior has become an insurmountable distraction to the House and our work for the American people." "With a heavy heart, I call on Anthony to resign," he said. Rep. Chris Van Hollen, the top Democrat on the House Budget Committee, said Weiner's "repeated violation of the public trust is unacceptable." "He can best advance the issues he fought for by resigning immediately," he said. Democratic leaders, who have been talking to Weiner all week, kicked off the coordinated effort Saturday once Weiner decided to seek treatment, a senior House Democratic aide told Fox News. His decision to seek treatment taken together with the pressure of Sunday show appearances and the House reconvening Monday added up to the ultimate decision for the leaders to call for his resignation Saturday, the aide said. On Thursday, leaders set an internal deadline for Weiner to resign no later than Saturday morning before they asked him to go. A senior Democratic source told Fox News that Democrats are not willing to tolerate a third week of news about Weiner's behavior because it distracts them from their agenda and is a disgrace to the House. The demands from the Democratic Party hierarchy came one day after Weiner acknowledged that he had exchanged online messages with a Delaware teenager. He said the exchanges involved nothing inappropriate. His party's leadership had refrained from demanding a resignation for days after Weiner admitted sending lewd photos and messages and at least one X-rated picture to a handful of women around the country over the past three years an