The Brief The Republican Party will host a historic two-day midterm convention starting Sept. 9 at the American Airlines Center in Dallas to help boost efforts to maintain control of Congress. While President Trump is expected to headline the event, the official convention schedule has not yet been released. A first of its kind midterm convention hosted by the Republican Party will be held in Dallas in a month. Related articleWhat they're saying:No political party has ever held a midterm convention. SMU political scientist Matthew Wilson said the optics of this rare midterm convention could have an impact on voters if the message is clear and coherent.