GUATEMALA CITY — An uncomfortable challenge confronts Guatemala's presidential candidates on Sunday: trying to win the votes of a nation that has put the last elected leader in court custody. Most are old-guard candidates picked to run before energized prosecutors backed by a mass anti-corruption movement led the collapse of the outgoing administration. Many voters are so skeptical that they campaigned for the election itself to be postponed to give them a new crop of choices. Leading in most polls with roughly 30 percent backing is Manuel Baldizon, a wealthy 44-year-old businessman and longtime politician. His running mate is accused by prosecutors of influence trafficking, but as a candidate enjoys immunity from prosecution. — AP