It's rare for more than one candidate to compete for the chance to run a long-shot campaign against a General Assembly incumbent from the other party.
But it's happening this year in record numbers, so far all involving Democrats who are vying in nine districts for the opportunity to take on incumbent House Republicans.
The nine districts would shatter the previous record of three, set in 2009.
The list of candidates is fluid. It's possible that some challengers could drop out, making a nomination contest moot. The deadline for candidates to enter a primary is March 30.
Below are links to the districts where more than one Democrat is seeking the right to challenge an incumbent Republican:
Feb. 25, 2017
Browse updates by month:September 2017