She took office in 2013 with the city facing a looming $13 million deficit. The city ended that year and each year since with more than $10 million in surplus.

Stothert also has twice proposed that the city lower its property tax rate. The City Council approved her first tax cut and is set to vote on the second one Tuesday.

If Stothert prevails on the budget vote, the city will have lowered its property tax rate by about 4 percent since she took office.

The city primary is April 4, and the general election is May 9.

Stothert is a Republican in an officially nonpartisan office. During the last campaign reporting period, which went through the end of 2015, Stothert had about $593,000 in her war chest.

That compares with about $234,000 for Mello, a Democrat who serves in the officially nonpartisan Legislature.

The next mayor will face some big issues, including aging infrastructure, the $2 billion sewer separation project and developing the riverfront.

At 37, Mello would be among the youngest mayors in Omaha’s history. (Mike Boyle, elected in 1981, was 37 when he took office, and The World-Herald reported then that he was the third-youngest mayor of Omaha.)