There is rising disillusion among liberals and peace activists that a president who built his campaign on his opposition to the war in Iraq now views America's other conflict as a "war of necessity".
Mr Obama has already added 21,000 extra troops to the 38,000 stationed there by George W Bush. In the next few weeks, he is likely to receive requests from the Pentagon for more when Gen Stanley McChrystal, the US commander in Afghanisan, submits a report on the progress of the war.
It is expected to paint a grim picture and offer the president three options for action: increase troop numbers dramatically, increase them less dramatically or leave them as they are.
Some organisations that campaigned against the Iraq war are biding their time or are more inclined to side with the president's argument that a stronger counter-insurgency effort in Afghanistan is in US national interests.
But others have run out of patience, and though they know they will not yet fill city centre streets with protestors, they plan to hold marches and smaller events such as forums with war veterans and troops' families, as well as lobbying members of Congress. (continues here at Telegraph UK)