Conservative-leaning Sen. Mark Pryor (D-Ark.) became the latest Senate Democrat on Tuesday to signal potential support for passing healthcare reform by a controversial parliamentary maneuver, following Sen. Ben Nelson's (D-Neb.) stance that it may be the only way.

Pryor said if Democrats use the maneuver called reconciliation -- which allows legislation to be passed with a simple majority of 50 votes, plus a tie-breaker by Vice President Joe Biden -- he would support the process, albeit reluctantly.

"I haven't seen all the details of what the president's trying to do with reconciliation, and it's not my first choice," Pryor said. "But under the circumstances, it may be the only way to pass legislation around here... It's not my preference. But we have reconciliation. It's in the rules. We can do it if we want to. My preference would be to have a big, bipartisan agreement, but in today's environment it's hard to do that."