ABC News’ Jonathan Karl reports: Has Joe Lieberman been bluffing? An article in this morning's The Hill newspaper says Lieberman has "reached a private understanding" with Harry Reid that he won't block a final vote on a health care bill. If true, that would contradict Lieberman's public statements last week, including his interview with ABC News "Subway Series" where he said he would join a Republican filibuster to kill the bill if it included a public option. Lieberman's office, however, says the Hill story is bunk, or, in spokesman Marshall Wittman's words "absolutely not true." Lieberman, Wittman says, will vote to block a final vote on any bill with a pubic option and has no "private understanding" with Reid to the contrary. Witmann says Senator Lieberman’s "clear position" is that he "will oppose cloture on a final bill if it contains a public option." "If you believe this story is true, you will also believe that I am replacing A-Rod in game six of the series," says Wittman, who doesn't look like much of a baseball player.Then again, he couldn't do any worse than A-Rod did during the last two games in the Bronx.