Senate Democrats held a nearly four-hour talk-a-thon on Monday night to protest the latest GOP bill to repeal and replace ObamaCare ahead of a potential vote next week. 

 
The Democratic floor protest ran just under four hours, kicking off at 6:51 p.m. with a speech by Sen. Dick DurbinRichard (Dick) Joseph DurbinMcCarthy: ‘No deadline on DACA’ Ex-Sheriff David Clarke: Trump only one who 'cares about black American citizens' DHS chief takes heat over Trump furor MORE (D-Ill.) and wrapping around 10:40 p.m. 
 
 
"It's just another version of the same old cruel, heartless, shameless plan that Republicans have spent the last eight months trying to jam down the throats of the American people," she said from the Senate floor. 
 
 
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Sen. Cory BookerCory Anthony BookerDHS chief takes heat over Trump furor Booker to Nielsen: 'Your silence and your amnesia is complicity' Homeland Security secretary grilled over Trump comments MORE (D-N.J.) said the upcoming debate over the Graham-Cassidy health care bill is a "moral moment" and a "call to the conscience of our country." 

"We face a time of jeopardy. Decision point. A cross roads ... of our values, a cross roads of our ideals," he said. "The decisions made here are not always easy." 
 
In addition to Merkley, Warren, Durbin and Booker, Democratic Sens. Tammy BaldwinTammy Suzanne BaldwinSenate campaign fundraising reports roll in Listen: EMILY’s List upbeat about Dem House in '19 Bolton to spend M boosting Wisconsin Senate candidate MORE (Wis.), Bob CaseyRobert (Bob) Patrick CaseySenate campaign fundraising reports roll in Senate Finance Dems want more transparency on trade from Trump Trump's 's---hole' remark sparks bipartisan backlash MORE Jr. (Pa.), Ron WydenRonald (Ron) Lee WydenWeek ahead: Senate takes up surveillance bill This week: Time running out for Congress to avoid shutdown Senate Finance Dems want more transparency on trade from Trump MORE (Ore.) and Brian SchatzBrian Emanuel SchatzHawaii false alarm sparks panic, confusion Hawaii EMA administrator takes responsibility for false missile alarm FCC commissioner: We will investigate Hawaii missile false alarm MORE (Hawaii) spoke from the floor.
 
"I want to be clear, this Cassidy bill will flunk the Jimmy Kimmel test of not hurting kids in America with pre-existing conditions," Wyden said. 
 
Murphy, wrapping up the Democratic speeches, argued that the Graham-Cassidy healthcare bill was the "meanest version of TrumpCare yet." 

"Kids are going to die if they don't have access to healthcare," Murphy said. "If 20 million people lose insurance ... thousands of people won't be able to survive." 

The CBO hasn't estimated yet how many individuals would lose their health insurance under the Graham-Cassidy bill. The agency previously estimated that 22 million people could become uninsured under previous GOP bill. 

Murphy noted that as a member of the Senate's Health Committee he's been working on a bipartisan deal aimed at stabilizing health insurance markets. 

"What a great trick Republicans will have pulled on this country. Everybody said that the repeal bill was dead; that we were going to move on to a bipartisan process," he said. "What a great head fake that would be if it was all a lie. If it was all a ruse." 
 
 
In addition to floor speeches, Booker also held a Facebook Live event with colleagues, including Schumer, off the Senate floor to discuss the GOP healthcare bill.  
 
Democrats don't have the ability to block a GOP ObamaCare repeal bill on their own. Under the special "reconciliation" budget rules being used by Republicans, which expire at the end of the month, GOP lawmakers can avoid a Democratic filibuster and pass a healthcare bill with a simple majority. 
 
A repeal bill has little chance of passing the Senate if Democrats are able to filibuster it, meaning Republicans would need to win over at least eight Democrats to pass a bill. 
 
 
Cassidy and Graham have said believe they have roughly 48 GOP senators who would be willing to vote yes, putting them close, but not yet at, the 50 votes needed to let Vice President Pence break a tie. 
 
If Democrats want to block the bill they need to win over at least three GOP senators. Republican Sens. Lisa MurkowskiLisa Ann MurkowskiSessions torched by lawmakers for marijuana move Calif. Republican attacks Sessions over marijuana policy Trump's executive order on minerals will boost national defense MORE (Alaska), Susan CollinsSusan Margaret CollinsDemocrats search for 51st net neutrality vote Overnight Tech: States sue FCC over net neutrality repeal | Senate Dems reach 50 votes on measure to override repeal | Dems press Apple on phone slowdowns, kids' health | New Android malware found Overnight Regulation: Dems claim 50 votes in Senate to block net neutrality repeal | Consumer bureau takes first step to revising payday lending rule | Trump wants to loosen rules on bank loans | Pentagon, FDA to speed up military drug approvals MORE (Maine) and John McCainJohn Sidney McCainMcCain rips Trump for attacks on press NSA spying program overcomes key Senate hurdle Meghan McCain says her father regrets opposition to MLK Day MORE (Ariz.) previously voted against the July repeal effort. 
 
The three senators have said they are undecided on Cassidy-Graham. Sen. Rand PaulRandal (Rand) Howard PaulNSA spying program overcomes key Senate hurdle Fix what we’ve got and make Medicare right this year Despite amnesty, DACA bill favors American wage-earners MORE (R-Ky.) has also said he cannot support the legislation. 
 

—Last updated at 11:09 p.m.