Democratic Governor Janet Napolitano continues to enjoy hefty leads over each possible GOP nominee.

The most recent Rasmussen Reports survey of the gubernatorial contest in Arizona shows Napolitano crushing Don Goldwater, nephew of conservative icon Barry Goldwater, 55% to 34%. And she attracts double the support accorded attorney Len Munsil, pulverizing him 58% to 29%.

Goldwater attracts more support from fellow Republicans than Munsil, but both lose about a third or so of GOP voters to the governor.

Another GOP contender, former state judge Jan Smith Florez, dropped out of the race in May.

Napolitano is viewed favorably by 66% of likely Arizona voters, Goldwater by 42%, Munsil by 34%. More than a quarter of voters still don't know either Republican well enough to hazard an opinion of him, whereas only 3% are Not Sure of the incumbent. The governor also enjoys a high job approval rating, 62%.

Arizona's primary election is September 12.

Although President Bush's job-approval numbers are as lackluster here as they are nationally, Arizona voters tend to trust the GOP more than the Democrats on an array of issues, especially immigration (with 44% trusting the Republicans more, 33% trusting the Democrats more) and national security (50% versus 35%). Republicans have a four-point advantage on energy policy and a seven-point advantage on the economy and on Iraq.

On none of the issues we polled about does President Bush receive a positive job rating as high as 50%. He comes closest on national security, where 25% say he's doing an Excellent job, 24% say he's going a Good one. (For more details, see our story on the Arizona Senate race.

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