From NBC's Mark Murray
Back in November 2006, former New York City Mayor Rudy Giuliani placed his toes in the presidential waters when he formed an exploratory committee (that allows him to raise money for a possible presidential bid). Next, he lowered his legs knee-deep into the waters by hiring some key Republican operatives for a run. And now, he appears poised to jump right in.
NBC News has learned that Giuliani has filed a statement of candidacy today with the Federal Election Commission, a move that fellow Republicans John McCain and Mitt Romney have already made, but not Giuliani -- until now. This statement of candidacy doesn't guarantee that Giuliani will run, but it certainly moves him one step closer toward taking the plunge.