WASHINGTON, Feb. 24 — President Bush tried to inject some optimism today into the collective gloom of the country's financially strapped governors. But he offered virtually no hope of any new injections of federal money. "We face common challenges," Mr. Bush said. "I look forward to working with you all to meet those challenges." Mr. Bush told the state leaders that his economic-stimulus plan would rejuvenate the economy, putting more money into the taxpayers' pockets and therefore more tax money into state coffers, which are being strained to the limits. "So this is the plan that I'm asking Congress to...