The president and his administration continued to defend and explain their approach to the health care law and its troubled website today.President Obama met at the White House this afternoon with 16 senators on that subject, a dozen of them Democrats, and most facing competitive reelection contests in 2014.Earlier, on Capitol Hill, the Cabinet secretary overseeing the new law ran into tough questions again.NewsHour congressional correspondent Kwame Holman reports.Now, some have asked, why not just delay implementation of the new law until all of the problems are fixed?Kathleen Sebelius conceded today there's pressure to extend the six-month period to enroll for health coverage. But the health and human services secretary insisted it's not the answer.Delaying the Affordable Care Act wouldn't delay people's cancer or diabetes or Parkinson.It doesn't delay the higher cost all of us pay when uninsured Americans are left with no choice but to rely on emergency rooms for care. So, for millions of Americans, delay is not an option.Sebelius emphasized there have already been significant improvements to the healthcare.gov website, but she acknowledged it's a huge job.I would say there are a couple of hundred functional fixes that have been identified, and they are in priority grouping. It's a pretty aggressive schedule to get to the entire punch list.