German Foreign Minister Frank-Walter Steinmeier said Thursday a letter sent by 47 Republican senators to Iran’s leaders has complicated talks over Iran’s nuclear program by allowing Tehran to claim the West is not negotiating in good faith. Mr. Steinmeier, whose country is among the group of six nations negotiating with Iran, said the March 9 letter warning that a nuclear deal may not last beyond the Obama Administration injected a new element of distrust into the already difficult talks. “It would have been difficult enough without the letter of the 47,” Mr. Steinmeier said in an appearance at the Center for Strategic and International Studies think tank in Washington. “Now it has become somewhat more difficult.” […]