WASHINGTON (AP) — Three days into a government shutdown, President Barack Obama pointedly blamed House Speaker John Boehner on Thursday for keeping federal agencies closed, while the bitter budget dispute moved closer to a more critical showdown over the nation’s line of credit. The president canceled a trip to Asia to remain in the capital as the Treasury warned of calamitous results if Congress fails to raise the debt limit.

Answering Obama, Boehner complained that the president was “steamrolling ahead” with the implementation of the nation’s new health care law. As the government operated sporadically, the stock market sank to its lowest level in nearly a month.