Some Democrats who support gun rights are showing openness to new regulations in the wake of last week's horrific elementary school massacre in Connecticut — but it remains to be seen whether that will yield anything without Republicans on board, NBC News reported Monday. One such Democrat was West Virginia's Sen. Joe Manchin III, who has long had the support of the NRA and who said Monday on MSNBC that "everything should be on the table." The dialogue on gun control got a boost Monday with a news conference held by New York City Mayor Michael Bloomberg, long a vocal supporter of stricter gun laws, as he called for President Barack Obama to push for tight regulation. But the White House appeared reticent to enter the fray, with Press Secretary Jay Carney declining to elaborate on Obama's remark Sunday night in Newtown that he would "use whatever power [his] office holds" to prevent such tragedies. "No single piece of legislation, no single action will fully address the problem," Carney said Monday. "Gun laws are a part of this, but they are not the only part of this."