Maine's Democratic Senate primary is slated for June.
The vote will determine who faces off against incumbent Republican Susan Collins in November.
One challenger is Maine's House of Representatives Speaker Sara Gideon. Gideon is the frontrunner among Democrats vying to challenge Collins in 2020.
Colby College of Waterville, Maine recently conducted a poll of voters in the state pitting Gideon against Collins.
For the first time since her first election in 1996, Collins faces an uphill battle. 43% of Maineiacs support Gideon to 42% for Collins.
While a 1% lead seems small, in past elections Collins polled much higher than her challengers.
Collins drew national attention and scorn over her vote to confirm Brett Kavanaugh. When Mother Jones released news of Collins' fallen popularity, frequent Trump critic George Conway decided to use Collins own words against her.
Others shared more infamous Collins' quotes.
While some shared video of Collins' greatest hits.
As of Thursday, February 20, the 2020 election is 256 days away.
There are 35 Senate seats being decided in 2020. 23 of those seats are currently held by the GOP, but three of those incumbent Republican Senators announced decisions to retire instead of seeking reelection.
Democrats need only gain 3-4 seats to take control of the Senate.
In addition to Susan Collins, the following Republican Senators will fight to keep their seats in November:
Dan Sullivan (AK), Tom Cotton (AR), Martha McSally (AZ), Cory Gardner (CO), Kelly Loeffler (GA), David Perdue (GA), Joni Ernst (IA), James Risch (ID), Mitch McConnell (KY), Bill Cassidy (LA), Cindy Hyde-Smith (MI), Steve Daines (MT), Thom Tillis (NC), Ben Sasse (NE), Jim Inhofe (OK), Lindsey Graham (SC), Mike Rounds (SD), John Cornyn (TX) and Shelley Moore Capito (WV).