>> to be clear, november 30th does not represent a relaunch of health care.gov. it is not a magical date. there will be times after november 30th when the site, like any web site, does not perform optimally. >> reporter: and too many people trying to log in could still spell trouble. the administration says they'll be put in a virtual queue and will get an e-mail with a better time to sign on. troubleshooters have been working round-the-clock, including at this command center in columbia, maryland. one expert we talked to said even if the 50,000 concurrent users goal is meant how much time they spent on the site cob a headache. >> it isn't how many lanes you have but how fast the cars can go down the highway. if there's a breakdown, you'll have a big traffic jam and pileup behind you. >> reporter: republican critics like congressman fred upton aren't letting up. he's taking aim at the administration's claim that