The White House, Democratic National Committee and pro-health care groups are going full force to build support in advance of tomorrow test vote on the Senate health care bill.

President Obama had nothing on his public schedule following a return from his 8-day trip to Asia, and administration sources said they believe he and the White House team are pushing senators to at least vote to bring the bill to the floor. So far, they've had good news today as conservative Democrats agree to that first step.

Vice President Joe Biden, who is celebrating his 67th birthday home in Delaware today, has been on the phone with lawmakers to bend their ears and ask for their support on the health care bill.

The DNC used the Obama Twitter feed today to urge: "The senate has unveiled an excellent health reform bill. Call your senators and ask them to move forward."

Organizing for America is asking supporters to phone Senate Majority Leader Harry Reid and Minority Leader Mitch McConnell, and OFA volunteers showed up yesterday on Capitol Hill when Reid released the bill.

OFA Director Mitch Stewart wrote: "Today, senators are listening carefully to see how Americans are reacting to the bill and how we want them to proceed. So it's our job to make sure they hear quickly and unmistakably: Move forward!"

Stewart asked supporters to call Reid and tell him, "Thank you for introducing a strong bill that helps all Americans. We support you and will stand with you in this fight," and then to ask McConnell not to delay the process.

The groups aren't alone - the Republican National Committee is letting pressure build on conservative Democrats and threatening to use tomorrow's procedural vote as ammunition against them even if they don't vote to pass the bill.