By MORGAN LEE
SANTA FE, N.M. (AP) — U.S. Sen. Martin Heinrich of New Mexico will seek a third term next year as he champions causes from gun safety to abortion access to a transition toward cleaner sources of energy. A win would extend Democratic domination of New Mexico’s Congressional delegation. Heinrich announced his reelection campaign Thursday in an online video that also highlighted federal spending on roads, bridges and wildfire relief. Immediate endorsements came from influential state Democrats including first-term Attorney General Raúl Torrez and House Speaker Javier Martínez of Albuquerque. Heinrich’s initial campaign pitch to voters touches on his advocacy for expanding early childhood education as well as 2022 federal gun legislation.