WASHINGTON (CNN) -- Vice President Dick Cheney carefully avoided talk about the 2008 presidential race in a CNN interview Wednesday, beyond expressing outright opposition Sen. Hillary Clinton "because she's a Democrat" and saying he and Sen. John McCain "agree on many things and disagree on others."

While refusing otherwise to speculate on the 2008 campaign, Cheney said the New York Democrat will not be president -- and, even if she should win, she wouldn't make a good commander-in-chief.

"I don't agree with her philosophically and from a policy standpoint," the vice president said.

McCain, an Arizona Republican and -- like Clinton -- a likely presidential aspirant, said last week that President Bush has "been very badly served by both the vice president and, most of all, [former] Secretary of Defense" Donald Rumsfeld.

But Cheney shrugged off McCain's comments, calling McCain a "good man" while admitting he disagreed with him and defending Rumsfeld for doing a "superb job" in his six years in the Bush administration.