WASHINGTON (Reuters) - A top US general in Afghanistan sought to stall an investigation into waste, abuse and mismanagement at a US-funded hospital in Kabul for political reasons, a former US army official will tell Congress on late Tuesday. Retired Colonel Gerald Carozza will accuse Lt Gen William Caldwell, then head of US and Nato efforts to train Afghan security forces, of delaying a military investigation into allegations of corruption and patient abuse at the Dawood National Military Hospital. “The evidence is clear to me that General Caldwell had the request (for a probe) withdrawn and postponed until last US election and then, after the election, tried to intimidate his subordinates into a consensus that it need not move forward at all,” Carozza said in testimony submitted ahead of Tuesday’s hearing.