NEW YORK, Sept 26: The District of Columbia’s online health insurance exchange – one of 51 set up under President Barack Obama’s healthcare reform law – will be unable to perform two key functions when it opens on October 1, exchange officials announced on Wednesday. The District joins Colorado and Oregon on the list of “Obamacare” exchanges hobbled by problems with information technology (IT), contributing to expectations that Obama’s signature domestic achievement will get off to a slow start when the exchanges go live next Tuesday. (agencies)