Fewer than half of vulnerable congressional candidates have speaking roles at GOP convention
Republicans hope to build momentum as they sag in the polls ahead of November's midterm election, but some vulnerable candidates skip the event.

TL;DR
- Less than half of the candidates in the 45 most competitive House and Senate races are speaking at the GOP midterm convention.
- Several vulnerable Republican candidates are opting out of the convention.
- The convention faces logistical challenges, including the start of the NFL season.
- A midterm convention is unusual outside of a presidential election year.
- Prominent Republican leaders and Trump administration officials are scheduled to speak.