A health care reform proposal that would expand Medicare appears to be in jeopardy.Liberals agreed to drop the public option in exchange for the expansion but it's now facing strong opposition.CBS News Correspondent Whit Johnson reports from Washington.Senate Democrats aren't willing to let ANYTHING stand in the way of health care reform --(SOT: Sen. Christopher Dodd/D-CT) :05-:11"BEFORE WE LEAVE HERE IN THE NEXT COUPLE OF WEEKS OR LESS WE ARE GOING TO PASS NATIONAL HEALTH CARE INSURANCE REFORM FOR ALL AMERICANS."That may mean dropping a proposal that would allow people as young as 55 to buy into Medicare. The plan was supposed to replace the public option. But now the Medicare buy-in is ALSO drawing strong opposition from lawmakers including one in particular --(SOT: Sen. Joe Lieberman/I-CT) (CBS Face the Nation) :29-:33IT WILL ADD TAXPAYER COSTS, IT WILL ADD TO THE DEFICIT. IT IS UNNECESSARY.Independent Senator Joe Lieberman has threatened to join Republicans in BLOCKING any bill with the proposal. Democrats need his vote to push the trillion dollar measure through.(STANDUP: Whit Johnson/CBS News/Washington) :44-:52PRESIDENT OBAMA PLANS TO MEET WITH SENATE DEMOCRATS AGAIN TODAY TO PUT THE PRESSURE ON. HE WANTS THEM TO COME TOGETHER AND PASS HEALTHCARE REFORM BY CHRISTMAS.(SOT: Sen. John McCain/R-AZ) :55-:58"THERE'S AN INCREASING SORT OF, SENSE OF DESPERATION ABOUT TRYING TO CORRAL 60 VOTES TO PASS THIS LEGISLATION.The G-O-P hasn't let up in its criticism. But that hasn't stopped the President from courting some MODERATE Republicans --(SOT: ManuRaju/Politico.Com) 1:10-1:17"HE'S REACHED OUT INDIVIDUALLY TO OLYMPIA SNOWE ON A REGULAR BASIS. HE'S CALLING HER, TALKING TO HER, TRYING TO GET HER ON BOARD, HE'S WORKING THAT VOTE VERY HARD.If Lieberman bows out and Snowe steps in it could pave the way to a health care victory.(SOT: Harry Reid/D-NV) 1:25-1:31"AT THE END OF THIS PROCESS WE HOPE DEMOCRATS AND EVEN A FEW REPUBLICANS WILL BE ABLE TO DELIVER GOOD NEWS TO THE AMERICAN PEOPLE."Whether that good news comes in time for the holidays...remains to be seen.Whit Johnson, CBS News, Washington