WASHINGTON – Lecturing fellow Republicans, President Donald Trump summoned GOP senators to the White House on Wednesday and told them face-to-face they must not leave town for their August recess without sending him an “Obamacare” repeal bill to sign. Senators responded by vowing to revive legislative efforts left for dead twice already this week. Success was far from assured, but Trump declared “I’m ready to act,” putting the responsibility on Republican lawmakers, not himself.