Mayor Michael Bloomberg said on Monday that he'll allow the Wall Street protesters to stay indefinitely, provided they abide by the law, marking his strongest statement to date on the city's willingness to let demonstrators occupy a park in Lower Manhattan.

"The bottom line is – people want to express themselves. And as long as they obey the laws, we'll allow them to," said Bloomberg as he prepared to march in the Columbus Day Parade on Fifth Avenue. "If they break the laws, then, we're going to do what we're supposed to do:...