What to watch in the US’s Delaware primary elections
It's the last state primary scheduled before November's midterm elections.

The last state primary election in the United States before the midterm elections in November is being held this week.
In Delaware, only registered Democrats can vote in the Democratic Primary, and only registered Republicans can vote in the Republican Primary since it is a closed primary system. Also, primary elections in the state are only held if there is more than one candidate per party running for an office. Those who run unopposed already advance to the midterm general election on November 3.
Delaware’s Democratic US senator, US representative and state attorney general are all seeking re-election. Voters will also choose nominees for the state legislature and for an open seat for state treasurer.
Delaware has shifted heavily Democratic since the 1990s. Republicans have not won the governorship since 1988, a US Senate seat since 1994 or the US House seat since 2008.