CHARLOTTE, N.C. —George W. Bush finally weighed in on the presidential race with four short words.

“I’m for Mitt Romney,” the former president said Tuesday as the doors of his elevator shut, perhaps his only statement of public opinion on the race before the Nov. 6 election.

Romney’s campaign doesn’t foresee the 43rd president playing a substantive role in the race. Aides are carefully weighing how much the former president should be involved in the GOP convention and for good reason. The Bush fatigue that was a drag on GOP nominee John McCain four years ago, and on the country, still lingers, including among Republicans.

“The Iraq war? The economy? Let’s not revisit President Bush’s record,” Richard Rinaldi, a 72-year-old Republican, said at a Romney rally last week in Charlotte. “There’s no desire to see him campaigning.”

Standing nearby, Roger Burba, a 73-year-old Republican from Pineville, N.C., put it this way: “He’s back in Texas, where he should be.”

While Bush’s standing has improved since he left office in January 2009, he remains a polarizing political figure. Romney’s aides fear Bush’s status could hurt the new Republican standard-bearer in battleground states like Ohio, Michigan and Wisconsin even though Bush could energize the party faithful and help raise money in solid Republican parts of the country.

There’s another risk: Romney linking himself too closely to the former president in any way would give Democrats ammunition to boost President Barack Obama’s argument that his Republican rival would restore Bush-era policies.

Bush is said to be enjoying retirement at home in Dallas. He’s largely stayed out of sight and out of politics since leaving office and is likely to sit much of the campaign, too. He spends his time raising money for and promoting his presidential library at Southern Methodist University, which was the reason he was in Washington on Tuesday when ABC News caught him and elicited the unscripted endorsement. He also gives speeches for charitable causes.