Louisiana Gov. Bobby Jindal, who has been preparing a longshot bid for the Republican presidential nomination, has scheduled a major announcement about his likely 2016 candidacy for later this month.

Jindal plans to declare his presidential intentions on June 24 with an event in New Orleans, an aide to the governor said late Tuesday. He is poised to enter a crowded Republican presidential field that already features nine announced candidates and likely will add a half dozen more in the coming weeks.

Jindal currently is in his second term as governor of Louisiana. He previously served in Congress, and ran his state's Department of Health and Hospitals and the University of Louisiana system.

Jindal, 43, a Rhodes Scholar and son of Indian immigrants, has long been hailed as a rising star in the Republican Party and one of its sharpest policy minds.

Yet he has struggled to break into the top tier of 2016 presidential candidates, despite aggressively courting the GOP's socially conservative base of evangelical and tea party voters and making frequent trips to Iowa, home to the nation's first presidential caucuses. In this week's Washington Post-ABC News poll, Jindal had support from less than 1 percent of likely Republican voters, ranking him behind 15 other contenders.