By ANDREA CROWLEY-HUGHES May 8, 2021 at 2:03 PM Union County Clerk Joanne Rajoppi displays the bright yellow envelopes mail-in ballots will arrive in for the June 8 primary election. Union County Clerk Joanne Rajoppi displays the bright yellow envelopes mail-in ballots will arrive ... Credits: Union County Clerk's Office By ANDREA CROWLEY-HUGHES May 8, 2021 at 2:03 PM UNION COUNTY, NJ — Voters will have a choice to vote by mail or in-person in the June 8 primary election, but drop boxes are here to stay, county officials said. Whichever way voters decide to cast their votes, the registration deadline is May 18. Since Gov. Phil Murphy announced the primary election will be mostly in-person, Union County Board of Elections Administrator Nicole DiRado said the county will return to “pre-COVID rules.”