WASHINGTON (Reuters) - North Carolina’s Democratic governor on Tuesday refused Republican demands for a full-fledged presidential convention in the state this summer, telling organizers that planning for a scaled-down event was “a necessity” due to the coronavirus. Governor Roy Cooper sent his letter to Republican Party leaders a day before the deadline President Donald Trump set for the state to guarantee that convention attendance in Charlotte would not be limited by social distancing restrictions. Cooper said he could make no such promise for the four-day nominating convention scheduled to open on Aug.