Evans finished third behind Anthony Williams and Kevin Chavous when he ran for mayor in 1998. (Mark Gail/The Washington Post)

The troika will soon be complete: Jack Evans said he will launch his second mayoral run on June 8, becoming the third sitting D.C. Council member to formally seek the city’s top office next year.

Evans, who has represented Ward 2 since 1991 and is the council’s longest-serving member, said Wednesday he will make his announcement at the corner of 14th and Q streets NW, outside the newly opened Le Diplomate restaurant.

Evans, 59, said the location, first tweeted by WRC-TV’s Tom Sherwood, does not reflect a particular interest in upscale French cuisine, but rather his desire to highlight the “rebirth” of the Logan Circle area, sparked by the 2001 opening of the Whole Foods Market on P Street NW.

“I think it really symbolizes the diversity of the city and the excitement here now,” he said. “You can see on 14th Street where we were 20 years ago and where we are today.”

The choice is akin to that of Tommy Wells (D-Ward 6), who launched his mayoral campaign earlier this month at the intersection of H Street and Bladensburg Road NE, highlighting his work there bringing the new and old together. Muriel Bowser (D-Ward 4) kicked off her run in March on the steps of her childhood home, emphasizing her deep roots in the city.

Bowser, Wells and Evans — all Democrats — have all been expected to enter the race for months, making the the recent string of campaign launches somewhat fait accompli. Another council member, David A. Catania, has also pondered a run, but as an independent, he can wait somewhat longer before making a decision.

Evans is the only one of the bunch who has a mayoral campaign under his belt. In 1998, he finished a distant third in the Democratic primary, earning 10 percent of the vote behind winner Anthony A. Williams and Kevin P. Chavous, then the Ward 7 council member.

Mayor Vincent C. Gray (D) has yet to decide whether he will seek re-election as a federal investigation into his 2010 campaign remains unresolved. “I’m thinking about it,” he said at a news conference Wednesday.

Asked by WUSA-TV’s Bruce Johnson what precisely he is thinking about, Gray said, “Thinking about the thought process.”