@IvanGubkin In theory that would work. However, donors & other democrats wanted an open convention to decide who their Presidential & Vice Presidential nominee would be: https://www.politico.com/news/2024/07/19/pelosi-support-open-nomination-biden-drop-out-00169893
That would be disastrous, as every party that held an open convention this late in the game lost to the party that did not as Americans would view an open (aka contested) convention as a sign of weakness & incompetence.