The son of politicians Bonnie and Alan Lowenthal, he was first elected in 2022 after a failed run for the State Assembly in 2018.

Before becoming a politician like his parents, he worked as a teacher and as a businessman who owned restaurants and a conference calling company.

[2] In 2018, Lowenthal ran for the California State Assembly as the sole Democratic candidate in the 72nd district, facing Republican Tyler Diep in the general election in over to replace incumbent Travis Allen.

[3][4] During the campaign, Diep was accused for using anti-Semitic imagery targeting Lowenthal.

[7] He ran for State Assembly again in 2022 in the newly-redrawn 69th district after incumbent Patrick O'Donnell announced his retirement.