Maryland’s bitter and expensive Democratic Senate primary will come to a close Tuesday, as voters choose the nominee for a race that could be key to deciding control of the chamber in November.

Democratic Rep. David Trone spent more than $60 million of his fortune from his wine retail store, swamping Maryland’s airwaves with campaign ads in his race against Prince George’s County Executive Angela Alsobrooks, who is vying to become the state’s first Black senator. 

The primary race to…