PORT-AU-PRINCE (AFP) -- The crowded field of candidates in Haiti's upcoming presidential elections includes two ex-presidents, a former rebel leader and a wealthy industrialist.

A total of 32 candidates are vying for the presidency in Tuesday's elections.

If none of the hopefuls gets 50 percent of the ballots, the two top vote-getters will face off in a second round in March.

The following are some of the notable candidates: - Rene Preval, 63: Preval is seen as the man to beat. A Cid-Gallup opinion poll in December gave him 37 percent support. He enjoys strong popularity in the slums of Port-au-Prince, thanks to his longtime association with Jean-Bertrand Aristide, the two-time president who stepped down and resigned in February 2004 as insurgents closed in on the capital. Preval was briefly prime minister in Aristide's first administration, which was ousted in a 1991 military coup. He was president from 1996 to 2001. He is running for the small Espwa (hope) party.

- Charles Henry Baker, 50: A wealthy industrialist, Baker has been a vocal critic of the current interim administration and before that of Aristide.

In 2003 and 2004 he was involved in the anti-Aristide Group of 184. The latest poll gave him 10 percent support.

- Leslie Manigat, 75: He was elected in January 1988, but was ousted in a military coup 134 days after his inauguration. He spent more than two decades in exile. The Cid-Gallup poll gave him 8 percent support.

- Marc Bazin, 73: A former World Bank official, Bazin lost to Aristide in 1990 elections and served as acting prime minister in the military government that seized power the following year. He was named planning minister after Aristide was re-elected in 2000. He is running for a coalition made up of his own party and a faction of Aristide's Lavalas Family party.

- Evans Paul, 50: A former mayor of Port-au-Prince, Paul is a longtime political activist. He managed Aristide's 1990 election campaign but later broke ranks with the now exiled former president.

- Guy Philippe, 37, A onetime police commissioner, Philippe led an insurgency that played a key role in forcing Aristide to resign and flee the country in February 2004. He has been accused of involvement in drug trafficking, but has not been charged and denies the claims.

- Serge Gilles: 70 A social-democrat, Gilles was a senator from 1990 to 1994, and is running for an alliance of three parties.