Washington (CNN) - The mayor of the nation's capital says he's going to run for re-election next year, ending one of the biggest guessing games in the city's local politics.
Mayor Vincent Gray visited the D.C. Board of Elections on Monday to pick up nominating petitions.
Gray won election in 2010, defeating incumbent Adrian Fenty in the Democratic primary before cruising to victory in the general election in a city where Democratic voters greatly outnumber Republicans.
But Gray's campaign then is the focus of a long-running federal investigation, with prosecutors saying his victory was tainted because his campaign was infused with $650,000 in illegal funds.
Four high-level campaign aides have pleaded guilty to felony charges.
Opponents, like D.C. council member and mayoral candidate Tommy Wells, are already calling attention to the investigation.
“Vince Gray was elected under false pretenses and doesn’t deserve a second chance because he ran a corrupt campaign,” said Wells in a statement. “I’ve known Vince Gray for years and I’m disappointed that he let me down—and everyone in D.C. down.”
Gray has not been charged with any wrongdoing.
Gray will now join a crowded primary field that already includes four members of the City Council and two other candidates.
The Democratic primary is scheduled for April 1.
While the campaign investigation has clouded Gray's first term, the city's economy has continued to grow during his three years in office.
Gray's also credited with continuing major education reforms that were implemented by Fenty, which have led to major improvements in math and reading test scores by the city's public school system.
- CNN Political Editor Paul Steinhauser contributed to this report.