Randall’s supporters were animated by a mix of factors, including the perception that George was too friendly to establishment Republicans.

Gov. Greg Abbott is a top sponsor and Speaker Dustin Burrows will be the first sitting speaker to address the gathering, as Republicans close ranks ahead of a tough midterm.

The power struggle between old-school Bush Republicans and hardline conservatives predates President Donald Trump. But he has used his clout to help tip the scales.

Some advocates for the region worry freshmen lawmakers will start deal-making at a deficit, while other voters see a chance for new blood.