UPDATE 2-U.S. Senate to take up auto bailout on Monday

(Adds Stabenow and Shelby comments; adds byline)

By John Crawley and Donna Smith

WASHINGTON, Nov 14 (Reuters) - The U.S. Senate plans to take up a $25 billion bailout bill for distressed domestic automakers on Monday, but it remains unclear if proponents can muster the support necessary to pass the legislation.

Democratic Majority Leader Harry Reid of Nevada said on Friday that he "plans to press forward" with emergency aid to automakers and a plan to extend unemployment insurance, even though Republican backing is not assured.

Reid plans to begin debate on Monday and hopes the Senate will conduct procedural votes early in the week.

It will be difficult for Democrats to push through an auto bailout if minority Republicans object and throw up procedural roadblocks.

In a letter to Republican Minority Leader Mitch McConnell of Kentucky, Reid said the legislation was needed to protect millions of workers "at risk from the possible collapse" of carmakers and companies that depend on their business.

General Motors Corp (GM.N), Ford Motor Co (F.N) and Chrysler LLC are furiously lobbying for $25 billion in immediate bailout money to help them survive the industry's worst financial crisis.

Analysts have warned that any government assistance, which they say is imperative for GM to survive through early 2009, would come at a significant cost to existing shareholders.

Sen. Debbie Stabenow, a Michigan Democrat and a leading architect of bailout strategy, told CNBC that failure of one or more of the domestic automakers would rock the nation's manufacturing economy, already reeling from downsizing.

"What is being talked about now is bankruptcy," Stabenow said.

GM, Ford and Chrysler have all said Chapter 11 bankruptcy restructuring is not an option.

On Thursday, Senate Banking Committee Chairman Christopher Dodd, a Connecticut Democrat, said he did not see enough support in the Senate to approve any auto bailout now and would be hesitant to bring it up if there was a chance of failure.

Sen. Richard Shelby of Alabama, the top Republican on the Senate Banking Committee, said in an interview on MSNBC that a bailout would not help.

"It's going to be money down a rat hole," he said.

Detroit needs a plan and new models to reverse its sinking fortunes, he said.