The White House is focusing on the March 31 countdown. On Saturday, 1.2 million people went to HealthCare.gov and 270,000 phoned the call center, record volumes for a Saturday.

Leading up to the deadline, President Barack Obama, Vice President Joe Biden, cabinet secretaries and other surrogates have done more than 300 radio interviews, attended 45 enrollment events and appeared in videos that have collectively gotten 33 million hits over the last six weeks, according to figures released to POLITICO by a White House official. There is nothing on the president’s public schedule related to Obamacare Sunday, however.

Since mid February, White House officials and cabinet secretaries have done more than 45 enrollment events across the country, with Health and Human Services Secretary Kathleen Sebelius on the road a good deal of the time.

They are particularly focusing on young people — needed to offset older and sicker people signing up for coverage — as well as African Americans and Hispanic populations that have high uninsurance rates. Officials are appearing on radio shows such as Live with Ryan Seacrest, Univision or Steve Harvey.