Ford's and General Motors' credit ratings are below investment grade, making it difficult for them to borrow money at affordable rates. Chrysler LLC is privately held and faces similar problems. Some lawmakers are worried. 'This industry could fall down, literally, or be absorbed if they don't get something in place very soon. I think it's that severe,' said U.S. Rep. Joe Knollenberg, R-Bloomfield Hills. 'Something has to happen pretty quickly because they can't compete paying 15 to 20 percent' interest. Greg Martin, a GM spokesman, said: 'There are many more relevant voices in this discussion that see the existing provision for what it is: a sound, smart policy to inject capital into the industry to get advanced technology vehicles on the road quickly.' Barack Obama, the Democratic nominee, has endorsed the $50 billion package; his Republican rival John McCain supported fully covering a $25 billion package in last year's energy bill. Nader, who advocates a national Medicare program for all Americans and a six-month negotiated withdrawal in Iraq, has run for president five times. An attorney, author and consumer advocate, he has been named by Time Magazine one of the '100 Most Influential Americans in the 20th Century.' Staff Writer Mark Hicks and the Associated Press contributed.