An attorney for Michael Cohen, President Trump’s former lawyer, is backing away from confident assertions he made that Cohen has information to share with investigators that shows Trump knew in 2016 of Russian efforts to undermine Democratic nominee Hillary Clinton. Lanny Davis, a spokesman and attorney for Cohen, said in an interview this weekend that he is no longer certain about claims he made to reporters on background and on the record in recent weeks about what Cohen knows about Trump’s awareness of the Russian efforts. Davis did not rule out that his claims were correct but expressed regret that...