Meanwhile, the message from the White House as Senators returned was one of being committed to the GOP health care effort, with officials saying the goal remains to get it done before lawmakers leave Washington on July 28, for a summer break that lasts until Labor Day.
But Legislative Director Marc Short also made clear that the President might ask Congress to stick around.
As for Democrats, they returned to D.C. with a fresh demand for bipartisan work on health care - an idea that has been frowned upon by the White House and most Republicans.
"We believe it is important for the Senate to focus on common sense reforms," top Democrats wrote in a letter to the Senate Majority Leader, as they listed several ideas in a Monday letter.
"Even after weeks of work, it seems my friends on the other side are no closer to having enough votes to proceed to their bill," said Senate Democratic Leader Charles Schumer.
"When you can't defend the substance of the bill, it's time to move on," Schumer said.