State Sen. Pat Fallon (R-Prosper) announced this week that is exploring a potential primary challenge to incumbent Republican U.S. Senator John Cornyn in 2020.

Fallon, a former state representative who was elected to the state senate in 2018, told the True Texas Project on Monday night that he is exploring a challenge to Cornyn. Fallon pitched himself as a candidate who would be able to energize the conservative Republican base, versus an incumbent like Cornyn. Fallon mentioned that Democrat Beto O’Rourke energized Democrats in 2018’s Texas Senate race, and cited that Republicans will need a similar enthusiasm for their candidate to win in 2020.

If Fallon joined the race, it would mark the second straight cycle in which he has appeared on the ballot versus an incumbent. In 2018, Fallon defeated incumbent Sen. Craig Estes to claim the District 30 senate seat. Fallon won 62 percent of the vote versus Estes’ 23 percent in that contest.

Alongside Cornyn, Dwayne Stovall and Mark Yancey are running in the Republican primary for the U.S. Senate in 2020. A number of Democrats have also signed on to challenge Cornyn.

Candidates can begin filing for spots on the ballot in December.