"I shouldn't have said it. It also proves I would not be a good politician," Dimon said in an interview on ABC's "This Week."
On Wednesday, Dimon quickly backtracked after saying he could beat Trump in a campaign but not liberal Democrats.
Dimon said he was speaking "more out of frustration and my own machismo," and had no plans to run for president.
"I never say never to anything, but no," Dimon said when asked if he would run for president.
"He should take some credit," Dimon said, for regulatory and tax changes. "That has helped the economy. It is impossible to tease out how much."
(Reporting by Howard Schneider; Editing by Nick Zieminski)
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