Luke Letlow, R-Start, chief of staff to exiting U.S. Rep. Ralph Abraham, speaks after signing up to run for Louisiana's 5th Congressional District, on July 22, 2020, in Baton Rouge, La. (AP Photo/Melinda Deslatte)

Martin Lemelle Jr., D-Ruston, chief operating officer at Grambling State University, speaks after signing up to run for Louisiana's 5th Congressional District, on July 22, 2020, in Baton Rouge, La. (AP Photo/Melinda Deslatte)

FILE - In this Aug. 13, 2019 file photo, House Republican leader Lance Harris, R-Alexandria, asks questions of Louisiana Department of Health officials about new contract awards for the Medicaid managed care program, in Baton Rouge, La. Harris, is running for the 5th Congressional District seat in Louisiana. (AP Photo/Melinda Deslatte)

Shreveport Mayor Adrian Perkins, a Democrat, speaks after registering for the U.S. Senate race, on Thursday, July 23, 2020, in Baton Rouge, La. Perkins is challenging Republican incumbent Bill Cassidy for the Senate seat. (AP Photo/Melinda Deslatte)

Matt Hasty, R-Pineville, a retired Army veteran, speaks after signing up to run for Louisiana's 5th Congressional District, on July 22, 2020, in Baton Rouge, La. (AP Photo/Melinda Deslatte)

Shreveport Mayor Adrian Perkins, a Democrat, signs the registration book as he qualified for the U.S. Senate race, on Thursday, July 23, 2020, in Baton Rouge, La. Perkins is challenging Republican incumbent Bill Cassidy for the Senate seat. (AP Photo/Melinda Deslatte)

Shreveport Mayor Adrian Perkins, a Democrat, signs the registration book as he qualified for the U.S. Senate race, on Thursday, July 23, 2020, in Baton Rouge, La. Perkins is challenging Republican incumbent Bill Cassidy for the Senate seat. (AP Photo/Melinda Deslatte)

Peter Wenstrup, D-New Orleans, speaks after registering for the U.S. Senate race, on Thursday, July 23, 2020, in Baton Rouge, La. Perkins is challenging Republican incumbent Bill Cassidy for the Senate seat. (AP Photo/Melinda Deslatte)