Mayor Eric Adams, who will kick off his independent campaign for reelection later in the week, offered a pox on the houses of all his opponents on Tuesday, including Republican Curtis Sliwa . “All four of us should be defined by the word ‘record.’ One person doesn’t have a record, one person is running from their record, and I have a record,” Adams said , referring to Mamdani and Cuomo. “Curtis does a good job with cats, but he doesn’t do a good job in making sure our city is functioning.” The mayor was asked who he voted for. He said he put “Eric Adams” on every line. CBS News New York political reporter Marcia Kramer has seen it all during her many years covering elections in New York City. She says former Gov. Andrew Cuomo and Queens Assemblyman Zohran Mamdani slugging it out in the mayoral primary reminds her of two recent Democratic congressional primary races . First, there was then-unknown Alexandria Ocasio-Cortez, the insurgent, defeating long-time Rep. Joe Crowley in a stunning upset back in 2018 . The other happened last year when then-Westchester County Executive George Latimer, a moderate, defeated Rep. Jamaal Bowman , who was at the time one of the most progressive lawmakers in Congress. Kramer says the question on Election Day is if Mamdani will become this season’s AOC, or if Cuomo will show that a moderate voice is what New York City voters really want. No matter how it plays out, a winner won’t be known for several days. The New York City Board of Elections has to wait until the absentee and affidavit ballots are in. The standard wisdom is that’s if Cuomo is ahead by 10 points or more he will definitely prevail. However, if he is ahead by five or less, Mamdani has a leg up. What’s unclear is whether the campaign waged by Mamdani and City Comptroller Brad Lander to not rank Cuomo will have an impact. Kramer says a lot of people “bullet voted,” meaning they did not use rank choice voting, opting instead to vote for only one candidate. That candidate, Kramer reported, was Cuomo. Nearly 400,000 people voted early in the primary, with the most ballots cast in Brooklyn and the fewest in Staten Island, according to the NYC Board of Elections . Here’s the breakdown by borough: Early voting went from June 14-22 . Hundreds of thousands of New Yorkers went out to vote Tuesday morning and afternoon, even as temperatures reached 100 degrees in the city. Gov. Kathy Hochul signed an executive order days before the election ensuring people waiting in line to vote can receive water and other refreshments. It was historically hot across the Tri-State Area. Kennedy Airport hit 100 degrees for the first time since 2013 and Newark Airport reached 103 degrees, a new record for June. While polling heading into the primary consistently showed Cuomo winning, one released the day before the election had Mamdani defeating him . The Emerson College Polling/PIX11/The Hill poll released Monday had the two leading candidates neck and neck, with Mamdani ultimately winning the ranked choice voting simulation after eight rounds. Lander was the only other candidate with double digit support in the first round in the poll. To read more, click here . Voters can rank up to five of 11 candidates in the Democratic primary. Here are the candidates as they appear on the ballot: Click here for more about the top candidates. Not sure where to vote? Click here to use the NYC Board of Elections tool and find your polling place. You need to be in line by 9 p.m. to vote. Ranked choice voting, also called instant runoff voting , allows voters to rank candidates from their first choice to their fifth. Advocates of ranked choice voting say it gives more diverse candidates a chance in competitive races. Voters can rank up to five candidates, but they’re not required to. Ranking just one, two, three or four candidates is fine. When votes are tabulated, all first-choice votes are counted initially. If a candidate receives more than 50% of the votes, they win. If no candidate receives more than 50%, the counting continues in rounds until there is a winner. At the end of each round without a winner, the candidate with the fewest votes is eliminated. Anyone who voted for that candidate will have their next choice counted in the following round. That means your second choice is only counted if your first is eliminated. If your first and second choices get eliminated, your third choice is counted, and so on. This process can continue until only two candidates are left. At that point, the one with the most votes wins. This is the city’s second mayoral primary election with ranked choice voting. Mayor Adams won the 2021 Democratic primary after several rounds. Ranked choice will not be used in the November general election, where a simple majority is needed to win. Mark Prussin is a digital producer at CBS New York. He covers breaking news, sports, politics and trending stories in New York, New Jersey and Connecticut. Mark joined the CBS New York team in 2019.