Campaign aides say Texas Rep. Ron Paul will run for president for a third time.
Aides said Paul will announce those plans on Friday while in New Hampshire. He formed a campaign exploratory committee last month.
The aides would speak only on background because the announcement is not yet official.
Paul ran for president in 1988 as a Libertarian and sought the Republican nomination in 2008. He amassed a large following with his libertarian views but it didn't translate into a significant number of delegates.
He calls for dramatically reducing government spending and scaling back management of the economy.