Though the Republican field in the 19th congressional district is a crowded, Assemblyman Peter Lopez is training his fire on one rival candidate in particular: His former boss, John Faso.

Lopez questioned in a radio interview on Monday with Fred Dicker whether Faso could properly understand the needs of constituents in the Hudson Valley district if elected to the House of Representatives.

“Where was he during the floods?” Lopez said in the Talk-1300 radio interview. “Where was he during the SAFE Act?”

Lopez is one of four Republicans who have filed to run for the Republican nomination to replace Rep. Chris Gibson, a three-term incumbent who will retire at the end of his current term as he considers a run for governor.

Lopez was an aide to Faso, who is a former minority leader of the state Assembly and later ran for governor in 2006. For the last decade, Faso has worked as a lobbyist for Manatt, Phelps and Phillips — a resume that another Republican candidate, Andrew Heaney, has also sought to criticize in the early weeks of the campaign.

Lopez’s criticism of his former boss likely reflects Faso being the best known candidate on the Republican side for the moment and that his greatest liability could be his work for the firm.

“He certainly has name recognition,” Lopez said in the interview. “People have said, ‘Really Pete, you’re like the incumbent because you’re on the ground.'”

In knocking Faso’s time as a lobbyist, Lopez sought to play up his own work in the district, especially on behalf of constituents — a potentially crucial connect he’ll have to cultivate given the fundraising advantages both Heaney and Faso are expected to bring to the race.

“John has not been there for more than a decade,” Lopez said. “People have said, ‘Really Pete, you’re like the incumbent because you’re on the ground.'”

Updated: Faso spokesman Bill O’Reilly responds.

“I can think of no one who’s been more consistently active in working to get New York’s economy back on track than John Faso,” he said. “At the same time, it’s important to note than John has both private and public sector experience. He knows what it means to work for a paycheck and to work ever longer hours to raise children and get them through school.”