We’ve talked a lot here at the Derby about the importance, or lack thereof, of national polls at this stage in a presidential campaign. Still, Team Romney can’t be thrilled that they continue to trail Morose McCain on the national scene. Today brings yet another poll with Romney stuck in 4th.

Poll: Giuliani leads for GOP nomination

WASHINGTON (CNN) — Former New York Mayor Rudy Giuliani is leading the pack of Republican presidential hopefuls, supported by 29 percent of respondents in a poll released Friday.

Unannounced candidate former Sen. Fred Thompson is close behind with 22 percent, according to the CNN/Opinion Research Corp. poll. Sen. John McCain of Arizona is a distant third with 16 percent, and former Massachusetts Gov. Mitt Romney had 12 percent support.

Of the last five significant national polls: Rasmussen, CNN, USA Today/Gallup, Cook/RT Strategies, Newsweek, Romney bests the Arizona senator in only one.

It’s one thing to poll fourth as a national political newcomer, it’s another to poll fourth behind John McCain, a man who has a greater chance of winning America’s Got Talent as he does the GOP nomination.

When is it time to worry that Mitt still trails McCain?