Republicans are gathering in Dallas this week for an unusual midterm convention.

The two-day event, a first for the party, brings hundreds of GOP elected officials, candidates, donors and state and local party leaders to the American Airlines Center in downtown Dallas. But unlike a typical party nominating convention, there will be no official business to conduct.

Instead, it offers Republicans a chance to hone their message heading into this year’s midterm elections, fire up voters and lavish praise upon President Donald Trump, the gathering’s brainchild.

And the convention comes at a time when Republican control of Washington is on the line this fall, with Democrats looking to flip both the House and Senate.

Here are five things to know about the Dallas convention.