Colin Powell was President George W. Bush’s first secretary of state, but that doesn’t necessarily mean he’s supporting the presidential bid of fellow Republican John McCain.

“I’m looking at all three candidates, I know them all very, very well, I consider myself a friend of each and every one of them, and I have not decided who I will vote for yet,” Powell said on ABC’s “Good Morning America.”

Powell, like McCain, is a military veteran who publicly supported the invasion of Iraq in 2003, and he served as chairman of the Joint Chiefs of Staff during the first Gulf War in 1991.

But while McCain wants a continued U.S. military presence there, Powell said the armed forces will simply be unable to maintain 140,000 troops in Iraq beyond next year.

Whoever is president next year, “they will face a military force, a United States military force, that cannot sustain, continue to sustain, 140,000 people deployed in Iraq,” Powell said. “They will have to continue to draw down at some pace.”

Powell said he was impressed with fellow African-American Barack Obama, despite the Democratic Illinois senator’s relative lack of experience.

“Sen. Obama, he didn’t have a lot of experience in running a presidential campaign, did he, but he seems to know how to organize a task and he seems to know how to apply resources to a problem at hand,” Powell said.

“So that gives you some indication that (despite) his inexperience in foreign affairs and domestic affairs, he may be somebody who can learn quickly.”

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Photo credit: REUTERS/Lee Jae-Won (Powell speaks at the World Knowledge Forum in Seoul October 17, 2007)

WASHINGTON — Speculation about who would make a good vice presidential running mate for Republican John McCain ranges all the way from party also-rans Mike Huckabee and Mitt Romney to Democrat Bill Richardson. But a new Gallup survey shows the largest bloc of rank-and-file Republicans — 31 percent — are those who cannot name a candidate for the job.

The next biggest group, 21 percent, prefer the choice marked “other.”

Huckabee and Romney, who were both defeated by McCain in the Republican presidential primary race, led the pack of named choices with 18 percent and 15 percent, respectively, in the telephone survey conducted March 24-27.

Some 8 percent of 453 Republicans and Republican-leaning voters polled would like to see Secretary of State Condoleezza Rice as vice president.

She was followed by the “no opinion” category which drew 5 percentage points.

Then came three other former Republican hopefuls: Fred Thompson with 4 percent; and Ron Paul and Rudy Giuliani with 2 percent apiece.

Sen. Joe Lieberman, the Connecticut independent who has appeared at campaign events with McCain, also got 2 percent.

Former Democratic presidential hopefuls John Edwards and Bill Richardson each drew 1 percent.

Gallup said the results have a 6 percentage-point error margin.

Click here for more Reuters 2008 campaign coverage

Photo credit: REUTERS/Jason Reed (McCain speaks at the Naval Academy in Annapolis on April 2)