Sen. Benjamin L. Cardin (D-Md.) in July. (Mike Theiler/Reuters)

The Sept. 5 World article “Cardin breaks with most Democrats, will vote against Iran deal” showed that my U.S. senator, Benjamin L. Cardin, has forgotten that he represents Maryland — not the American Israel Public Affairs Committee, not a portion of the Jewish community, not Israel. His constituents expect him to vote based on the best interests of the United States, which in this case also is in Israel’s long-term interest, not based on what his rabbi says.

He has demonstrated that he is incapable of doing his job.

Carol Anderson, Bethesda

Sen. Benjamin L. Cardin’s plan to oppose the Iran nuclear deal is an embarrassment to the people of Maryland [“A vote of conscience on Iran,” op-ed, Sept. 6]. Though a Democrat, he allied himself with the Republicans in Congress, the Republican presidential contenders, Israeli Prime Minister Benjamin Netanyahu and the powerful pro-Israel lobby. He turned his back on President Obama and rejected the long, difficult work of Secretary of State John F. Kerry and his counterparts from five other major countries.

The alternative he offered is a bill he will introduce to send more U.S. taxpayer money to Israel. One wishes he took the path to peace with Iran, instead of to potential war. My thanks to Sen. Barbara A. Mikulski (D-Md.) for a more enlightened stance.

Stephen O. Dean, Gaithersburg