Guthrie for Congress issued the following announcement on Dec. 23
In 2020, all state representative seats and half of our state senate seats are up for lection in addition to all US house of representative seats and one US Senate seat (currently held by Mitch McConnell)
If you're already registered in Kentucky, Monday Dec 31 is the last day top "lock in" your political party choice for purposes of voting in May primary elections for those races or for purposes of becoming a candidate in one of those races.
The only people who will be able to vote in the May Primary Election for the Democratic candidates are registered Democrats and the only people who will be able to vote for the Republican candidates are registered Republicans. In the November General Election, any registered voter may vote for any candidate.
To find out how you're registered right now, visit here - https://vrsws.sos.ky.gov/VIC/
To update your voter registration, start here - https://vrsws.sos.ky.gov/ovrweb/default
Additional 2020 election dates:
January 10: Candidate filing Deadline (4pm, Last day to file nomination papers for candidates who must run in primary)
April, 20: Primary Election Voter Registration Deadline (Note that 17-year olds who will be 18 on or by Nov 5 can register by this date and vote in the primary as 17 year olds.)
May 19: Primary Election Day (Polls open 6am to 6pm)
October 5: General Election Voter Registration Deadline (Note that 17-year olds who will be 18 on or by Nov 5 can register by this date and vote in the general election)
November 3: General Election (Polls open 6am to 6pm)
Original source can be found here.