Click here to watch "Crisis."

Coinciding with Monday's early-morning announcement that investment firm Lehman Brothers would file for bankruptcy, the McCain camp released its latest ad, "Crisis" (subscription), which contends only "proven reformers John McCain and Sarah Palin can fix" the economy.

The ad makes an explicit reference to the firm about halfway through when an image of the Lehman Brothers headquarters pops up on the screen. An announcer asserts that a McCain-Palin administration would impose "tougher rules on Wall Street to protect your life savings. No special-interest giveaways." The 30-second spot also touches on two mainstay economic topics: creating jobs (by lowering taxes) and lowering gasoline prices (through offshore drilling).

So what's missing from this ad? That would be an attack on McCain's Democratic rival, Barack Obama. In what has become an increasingly bitter battle between the two sides, this ad shows the GOP camp staying on the positive. Nonetheless, when the announcer stresses that "only proven reformers" McCain and Palin can fix the economy, the ad implies that Obama and running mate Joe Biden don't have what it takes.