Elections in four states Tuesday will offer test runs for 2020

President Donald Trump, left, talks to Kentucky Gov. Matt Bevin, right, during a campaign rally in Lexington, Ky., Monday, Nov. 4, 2019. (AP Photo/Susan Walsh)

Gubernatorial and legislative elections in four states Tuesday will test voter enthusiasm and party organization amid impeachment proceedings against President Donald Trump and a fevered Democratic presidential primary scramble.