Reaching 60 votes in the U.S. Senate (Breaking News) - CNN dot-com update

Saturday July 30 -- what will happen if 53 Democrats and 4 Republicans (Collins, Snowe, Murkowski, Brown - of Maine, Alaska, Maine) don't find the others to add up to 60 needed to squelch the threatened Filibuster?  Will the Rules be over-riden?

Despite the House's pre-emptive rejection of the Reid plan, Senate Democrats say they are moving forward with its consideration. The Senate is tentatively scheduled to take up Reid's proposal beginning at 1 a.m. ET on Sunday -- part of that chamber's arcane procedural path required to get something passed before the Treasury runs out of funds.
Any proposal put forward by Reid will ultimately need the support of at least seven Senate Republicans in order to reach the 60-vote margin required to overcome a certain GOP filibuster.
In debt fight, what's the next move?
Who's to blame for debt ceiling debacle? Forty-three of the Senate's 47 Republicans sent a letter to Reid Saturday promising to oppose his plan as currently drafted. Maine's Olympia Snowe and Susan Collins, Massachusetts' Scott Brown, and Alaska's Lisa Murkowski declined to sign it.
McConnell urged Reid early Saturday afternoon to hold a quick vote on his bill in order to clear the way for new talks.
Your plan "will not pass the Senate. It will not pass the House It is simply a nonstarter," McConnell told Reid on the Senate floor. "Hold the vote here and now" and let's "not waste another minute of the nation's time."
Reid responded by accusing the Republicans of wasting time on the Boehner plan, and criticized the Senate GOP for not allowing his plan to be considered with a simple majority vote.
"The two parties must work together to forge an agreement that preserves this nation's economy," Reid said. "My door is still open."
Democratic leaders vehemently object not only to the balanced budget amendment, but also the GOP's insistence that a second debt ceiling vote be held before the next election. They argue that reaching bipartisan agreement on another debt ceiling hike during an election year could be nearly impossible, and that short-term extensions of the limit could further destabilize the economy.