(CNN) Former New York Mayor Michael Bloomberg is in Arkansas to file for the state's Democratic presidential primary, in the latest sign he is seriously considering a late entry into the 2020 race.

Bloomberg was in Little Rock Tuesday to file, according to a person with knowledge of his plans.

After saying in March that he wouldn't run for president, Bloomberg is preparing a potential run for a 2020 bid, in part, because he does not believe anyone in the current field of Democrats will be able to defeat President Donald Trump.

Bloomberg spokesman Howard Wolfson told CNN last week that the former mayor planned to file for Arkansas' Democratic primary before the state's Tuesday deadline. The mayor opted to file in person, something that is not required.

Bloomberg told CNN on Tuesday morning that he planned to travel to Arkansas, but said, "You'll have to come to see what we do."

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