NASHVILLE, Tenn. (AP) - Donors are choosing sides in Tennessee's open race to replace retiring U.S. Sen. Lamar Alexander.

READ MORE | Senator Lamar Alexander says he will not run for re-election in 2020 

During his first few weeks running, Republican Bill Hagerty raised $1.9 million and spent $24,400 through September. Hagerty's contributors included ex-Gov. Bill Haslam, former Florida Gov. Jeb Bush, former Congresswoman Diane Black, Nashville Predators Chairman Tom Cigarran and CoreCivic CEO Damon Hininger.

READ MORE | Republican Bill Hagerty enters Tennessee's U.S. Senate race 

Republican Manny Sethi raised $338,300, loaned his campaign $500,000 and spent $322,300 last quarter, ending September with about $2 million cash. Sethi has loaned his campaign $1 million total.

Sethi's contributors included ex-Gov. Winfield Dunn, state Sen. Janice Bowling and state Reps. Kelly Keisling and Dan Howell.

Republican Josh Gapp loaned his campaign $115,200 and raised $17,300.

Democrat James Mackler raised $348,000 last quarter, including help from actress Susan Sarandon. Mackler spent $168,000 last quarter, with $296,000 remaining.

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