Obama will try to rally Senate Dems on healthcare Sunday

President Barack ObamaBarack Hussein ObamaPatagonia files suit against Trump cuts to Utah monuments Former Dem Tenn. gov to launch Senate bid: report Eighth Franken accuser comes forward as Dems call for resignation MORE will meet with Senate Democrats on Sunday afternoon as party divisions over the healthcare reform bill have intensified.

Obama will attend a Senate Democratic caucus at 2 p.m. on Capitol Hill, according to a White House official. Divisions among the Democrats have increased over the last week over abortion language in the bill and the inclusion of a new public insurance plan.

Sen. Ben Nelson (D-Neb.) said he won't vote for the bill unless it restricts new federal healthcare subsidies from being used for abortions. He plans to bring up an amendment next week to include that restriction, which was added on to the House bill by centrist Democrats over the objections of most of the House Democratic Caucus.

Republicans have voiced support for the abortion restrictions but most Democrats are expected to oppose them. Republicans control only 40 seats, which means Nelson would have to pick up the support of at least 19 Democrats (or 18 plus one of two independents), an unlikely scenario given strong opposition from the Democratic base.

Obama will face a Democratic conference divided also over the public insurance plan. Senate Majority Leader Harry ReidHarry ReidBill O'Reilly: Politics helped kill Kate Steinle, Zarate just pulled the trigger Tax reform is nightmare Déjà vu for Puerto Rico Ex-Obama and Reid staffers: McConnell would pretend to be busy to avoid meeting with Obama MORE (D-Nev.) has included a government-run insurance plan in the Senate bill. It includes an "opt-out" clause allowing individual states to decline the public option for their residents.

But centrist Sens. Joe Lieberman (I-Conn.) and Blanche Lincoln (D-Ark.) said they oppose any form of a public plan, leaving Reid short of the 60-vote threshold he needs.

Democratic senators have been holding meetings with Reid in his office since Friday to try to close those differences. Sen. Jay RockefellerJay RockefellerOvernight Tech: Trump nominates Dem to FCC | Facebook pulls suspected baseball gunman's pages | Uber board member resigns after sexist comment Trump nominates former FCC Dem for another term Obama to preserve torture report in presidential papers MORE (D-W.Va.) said that the meetings involve 10 senators, "five moderates and five progressives." Those spotted heading into the room include Sens. Chuck SchumerCharles (Chuck) Ellis SchumerAmerica isn't ready to let Sessions off his leash Schumer celebrates New York Giants firing head coach: ‘About time’ GOP should reject the left's pessimism and the deficit trigger MORE (N.Y.), Tom CarperThomas (Tom) Richard CarperAvalanche of Democratic senators say Franken should resign Overnight Cybersecurity: Mueller probe cost .7M in early months | Senate confirms Homeland Security nominee | Consumer agency limits data collection | Arrest in Andromeda botnet investigation Senate panel moves forward with bill to roll back Dodd-Frank MORE (Del.), Sherrod BrownSherrod Campbell BrownThe Hill's 12:30 Report Avalanche of Democratic senators say Franken should resign Overnight Regulation: Feds push to clarify regs on bump stocks | Interior wants Trump to shrink two more monuments | Navajo Nation sues over monument rollback | FCC won't delay net neutrality vote | Senate panel approves bill easing Dodd-Frank rules MORE (Ohio), Russ Feingold (Wis.), Mary LandrieuMary LandrieuProject Veritas at risk of losing fundraising license in New York, AG warns You want to recall John McCain? Good luck, it will be impossible CNN producer on new O'Keefe video: Voters are 'stupid,' Trump is 'crazy' MORE (La.), Mark PryorMark PryorMedicaid rollback looms for GOP senators in 2020 Cotton pitches anti-Democrat message to SC delegation Ex-Sen. Kay Hagan joins lobby firm MORE (Ark.), Nelson, Lincoln and Rockefeller.

"We had the generalities a couple days ago, now we're getting into some brass tacks, and I think it's moving," Feingold told reporters after emerging from one closed-door session Saturday morning.

But other liberal senators signaled they're willing to fight any attempts that would remove or further water-down the public option.

"It's been slowly moving more toward insurance company interests in the last four months, and those days are done," Brown said.

Brown repeated his call Saturday for Obama to get more involved in talks.

"It's pretty clear where the great majority of Congress is and the great majority of the country is on this bill, and I just want to see the president speaking out and talking to those members that are a little less enthusiastic to support it," Brown said.

Obama went to the Hill to meet with the House Democratic Caucus in November, delivering a pep talk in Saturday session minutes before the first in a series of crucial votes leading up to a final roll call on the House bill to guarantee near-universal health insurance.

“I am absolutely confident we’ll get this done,” Obama told House Democrats, according to a senior Congressional aide who briefed reporters after the meeting. “And when I’m in the Rose Garden, signing a piece of legislation to give healthcare to all Americans, we’ll look back and say this was our finest moment."

This story was updated at 1:40 p.m.