Abortion funding could be the issue that makes or breaks health care reform.

Abortion opponents in the Senate say they want to see tough language keeping abortion funding out of the bill.

Sen. Ben Nelson, D-Neb., says he's considering introducing an amendment similar to the one in the House version.

Meanwhile, 41 House Democrats sent a letter to House Speaker Nancy Pelosi pledging to vote against the final bill if it includes restrictions on abortion.

Click play for comments from conservative radio show host Janet Parshall.

President Obama said the bill should not change current federal policy that forbids using taxpayer dollars to fund abortion.

"We're not looking to change what is the principle that has been in place for a very long time, which is federal dollars are not used to subsidize abortions," the president told ABC News.

"And I want to make sure that the provision that emerges meets that test -- that we are not in some way sneaking in funding for abortions, but, on the other hand, that we're not restricting women's insurance choices," he continued.  "There needs to be some more work before we get to the point where we're not changing the status quo."

Senate Majority Leader Harry Reid, D-Nev. has said a vote in Senate may not take place until next year.