WASHINGTON ― The Pentagon, as of Monday, had not issued departmentwide guidance about the possibility of a debt limit default — an event experts say would be a chaotic foray into uncharted territory. President Joe Biden accused Republican lawmakers on Monday of blocking efforts to increase the government’s borrowing authority, saying it poses a risk to Social Security benefits, troop salaries and veterans benefits. “We’re going to have to raise the debt limit if we’re going to meet those