Topic summary
Rump convention
Extracted from the Wikipedia article United States presidential nominating convention.
Bolter
Delegates to the convention are expected to support whichever candidate wins the nomination. A delegate who refuses to do so and walks out, or bolts, sometimes in public fashion, can be referred to as a bolter. A group of bolters may form an alternate convention that can be called a bolting convention; the remnants of the party or convention they leave behind can be called a rump convention.