President Barack Obama reportedly will invite Senate Democrats to the White House on Tuesday to discuss healthcare reform.

It will be the second time in as many weeks that the president has met with the entire caucus, currently torn over what the size and scope of their chamber's healthcare reform bill might look like.

Democrats are rapidly approaching their self-imposed, year-end deadline to complete healthcare legislation, in part because squabbling within the caucus -- especially over the public option and abortion -- has called into question whether Senate Majority Leader Harry Reid (D-Nev.) has the 60 votes required to end debate.

Those rifts became extremely apparent last weekend, after Sen. Joe Lieberman (I-Conn.) signaled he would not support a Medicare opt-in as a substitute for the public option. According to some reports, the White House has since pressed Reid to negotiate an end to the standoff with Lieberman, but the Obama administration dismissed that claim this afternoon.