Good morning ... Busy day. Let's just get into it.

What we're watching today: HELP Committee hearing on state flexibility at 10 a.m. (webcast here). Finance Committee hearing on "issues impacting cost and coverage," also at 10 a.m. (webcast here). Census Bureau releases new data on the number of uninsured Americans at, you guessed it, 10 a.m. Gonna be one of those mornings. Census webcast here.

Sen. Claire McCaskill and the other Democrats on the Senate Homeland Security and Governmental Affairs Committee hold a roundtable at 11 a.m. on their investigation of Insys Therapeutics and opioid manufacturers' marketing tactics.

What we're watching this week: Sen. Bernie Sanders introduces his single-payer bill on Wednesday. HELP Committee wraps up its stabilization hearings Thursday. Energy and Commerce hearing Thursday on health care workforce programs.

Are you a Democrat who might want to run for president? I'd love a heads-up before you co-sponsor Sanders' single-payer bill: