WASHINGTON — Speaker John A. Boehner announced Wednesday that he would introduce legislation next month allowing the House to sue President Obama over his use of executive actions. In a letter to lawmakers, Mr. Boehner expressed concern with what he — and many in the Republican conference — considered the president’s unconstitutional overreach. “The Constitution makes it clear that a president’s job is to faithfully execute the laws; in my view, the president has not faithfully executed the laws,” Mr. Boehner told reporters. “And when there’s conflicts like this between the legislative branch and the administrative branch it’s, in my...