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SANTA FE – Santa Fe District Attorney Marco Serna has filed an official statement of candidacy with the Federal Election Commission to run for northern New Mexico's 3rd Congressional District seat.

Serna, a Democrat, has said previously that he was considering a bid for the House position being vacated in 2020 by U.S. Rep. Ben Ray Luján, who is a candidate for the U.S. Senate seat that incumbent Tom Udall is retiring from.

Serna also had previously announced establishment of an exploratory campaign committee.

In a statement Tuesday afternoon, Serna stopped short of confirming he will run for Congress.

He said that he would be making “a formal announcement by the end of May regarding my plans” to expand his work on various issues, including opioid addiction, “protecting” Los Alamos National Laboratory, green energy, small business jobs, supporting tribal communities and public safety.

Serna was elected district attorney in 2016. Running for Congress next year would mean he won't seek another four-year term as DA.

Serna's FEC filing also designates a group called Marco for Congress as his principal campaign committee.

Serna was born and raised in Santa Fe and graduated from St. Michael's High School in 2001. His father is long-time political figure and former state insurance superintendent Eric Serna.

Other Democrats who have filed as candidates for the congressional seat include Santa Fe attorney Teresa Leger; state Rep. Joseph Sanchez of Alcalde; former CIA operative and author Valerie Plame of Santa Fe; and Gavin Kaiser of Santa Cruz. Raton businessman Mark McDonald filed as a candidate but has announced that he is dropping out and would endorse Serna.

Republican Brett Kokinadis of Santa Fe is also a candidate.