After briefly addressing the tragic Navy Yard shootings, President Obama delivered a sharply partisan message to Republicans on Monday.

Obama warned of an "extreme wing" of the Republican Party that was willing to shutdown the government over Obamacare.

Obama delayed his speech by about 50 minutes after news of the attack broke Monday morning, but pressed forward with his full remarks in the South Court Auditorium of the White House.

"The larger point is asked — after all that we have been through, after all the work to come back from the depths of a crisis, are some of these folks really still beholden to one extreme wing of the party that they are willing to take the entire economy just because they cannot get their way on this issue?" Obama asked. "Are they really willing to hurt people just to score political points?"

"I hope not," he added, acknowledging that he understood that some Republicans would never understand "the merits of Obamacare."

Obama insisted he had no intention of negotiating with Republicans over the debt limit either, pointing out that he would never run an election campaign again.

"In case there is any confusion, I will not negotiate over whether or not America keeps its word and meets obligations," he said. "I will not negotiate over the full faith and credit of the United States."