President Donald Trump seems to have rejected the idea of withdrawing US troops and ending the war. Instead, he intends to become the third president in a row to roll the dice on a "surge" – that is, to send in more troops (the initial estimate is anywhere from 3,000 to 5,000 more in addition to the current 8,400) and hope for the best.
That idea has never worked before and it's not going to magically start working now. If Trump can't bring himself to put an end to America's Afghanistan misadventure, Congress should force him to do so by either repealing its "Authorization for the Use of Military Force" or using its power of the purse to cut off funding for military operations in Afghanistan.
The US invasion and occupation of Afghanistan has been nothing but epic fail from the very beginning.