President Obama gave a brief nod to health care reform Monday with a Rose Garden rally for doctors. But he’ll spend most of his week on the most potentially far-reaching foreign policy decision of his administration: what to do in Afghanistan. Late Monday afternoon, Obama is scheduled to meet with Defense Secretary Robert Gates, who earlier in the day appeared to tacitly rebuke Gen. Stanley A. McChrystal when he said that military advice should remain “private.” McChrystal, the commander of the roughly 100,000 U.S. and international forces in Afghanistan, has carried out a very public campaign on behalf of his stark assessment of the war, which calls for a new military strategy and vastly more resources to carry it out. The public advocacy, including a blunt speech in London last week during which he rejected more modest options being considered within the White House, has forced Obama and his advisers to discuss a pivotal policy review more publicly than they had wanted. Continua…