The Mid-Atlantic Pipe Trades Association is a labor union representing members in Maryland, Virginia, and Washington, DC. It is affiliated with the United Association.
2014
–Endorsed Anthony Brown (D) for Governor of Maryland (lost general election)
2018
–Endorsed Larry Hogan (R) for Governor of Maryland (won)
2020
–Endorsed John Sarbanes (D) for Representative of Maryland, 3rd District (won)
–Endorsed Anthony Brown (D) for Representative of Maryland, 4th District (won)
–Endorsed David Trone (D) for Representative of Maryland, 6th District (won)
–Endorsed Qasim Rashid (D) for Representative of Virginia, 1st District (lost general election)
–Endorsed Don Beyer (D) for Representative of Virginia, 8th District (won)
2021
–Endorsed Jennifer Carroll Foy (D) for Governor of Virginia (lost primary)
–Endorsed Mark Herring (D) for Attorney General of Virginia (lost general election)
2022
–Endorsed Wes Moore (D) for Governor of Maryland (won)
–Endorsed Anthony Brown (D) for Attorney General of Maryland (won)
–Endorsed Donna Edwards (D) for Representative of Maryland, 4th District (lost primary)
–Endorsed Don Beyer (D) for Representative of Virginia, 8th District (won)
2024
–Endorsed Angela Alsobrooks (D) for Senator of Maryland (won)
–Endorsed Johnny Olszewski (D) for Representative of Maryland, 2nd District (won)
–Endorsed Sarah Elfreth (D) for Representative of Maryland, 3rd District (won)
–Endorsed Dan Helmer (D) for Representative of Virginia, 10th District (lost primary)
2025
–Endorsed Abigail Spanberger (D) for Governor of Virginia (won)