Where did everything leave off Tuesday night?

Understandably, confusion is rife over what the heck is happening on the Senate floor: What was that vote Tuesday night? Why did Senator John McCain, Republican of Arizona, give that impassioned speech saying he would not vote for the Senate health care bill as it stands, then turn around and cast a yes vote on Tuesday night?

An explainer:

When the Senate voted 51-50 to begin debating the repeal of the Affordable Care Act, technically senators were bringing the repeal bill that was passed in the House to the Senate floor. For now, that is the bill that senators are trying to reshape.

On Tuesday night, Senate Republican leaders brought to the floor their most complete version of a plan to repeal and replace the Affordable Care Act. That measure had been worked out behind closed doors by the majority leader, Senator Mitch McConnell of Kentucky, and it would dismantle major parts of the current health care law, including the requirement that most people have health insurance.

But it also included an overture to Senate conservatives, a measure championed by Senator Ted Cruz, Republican of Texas, that would allow insurance companies to sell stripped down, low-cost insurance plans as long as they also offer insurance policies that comply with federal standards, including the requirement that plans cover “essential” services like maternity care, mental health treatment and prescription drugs.