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INDIANAPOLIS – Hillary Clinton tried rallying the support of hundreds of the nation’s top mayors gathered in Indianapolis Sunday, attending the 84th annual U.S. Convention of Mayors.

The presumed Democratic presidential nominee addressed the mayors for about 30 minutes on topics ranging from gun control, immigration, the ‘Brexit’ and Congress.

“We all are – especially me – counting on you our mayors to get stuff done,” she said.

The stop comes just hours after a new CBS News Battleground Tracker poll shows Clinton with just a narrow lead over Donald Trump in Florida, Colorado and Wisconsin, all key battleground states.

Clinton’s message for mayors in those states, alongside more than 200 from across the country, targeted not only the number of Democratic delegates in the room but Republican mayors, many who are wary of another Democrat being elected to the White House.

“Mayor show up,” she said. “You do your job. The American people show up and do their job.”

Clinton rallied against Congressional inaction on gun legislation, targeting Republican Donald Trump, who was also invited to the conference but declined to attend.

“You can’t respond with a snarky tweet,” Clinton said. “You’ve actually got to deliver results because you know you’re going to see them at the supermarket and your kids ballgames and everywhere in the city.”

Clinton acknowledged the group of mayors representing Democrats, Republicans and Independents.

“I think all mayors are skeptics when it comes to asking presumptive presidential candidates what they’re going to do for cities,” Carmel Mayor Jim Brainard said, a Republican. “We have a lot of questions for whoever the next president is going to be.”

Clinton didn’t make any specific promises to the group of mayors beyond open dialogue and what she said will be an ally in the White House if elected.

“I will never plan for you,” she said. “I hope we will plan with you to respond to your priorities.”

Libertarian party nominee Gary Johnson, former governor of New Mexico, will address the conference Monday morning.