Blackburn’s campaign also announced that the average donation for her campaign was $341.
“Voters across Tennessee are joining our team because they understand I am a card-carrying Tennessee conservative who will help President Trump drain the swamp,” Blackburn said in a statement.
In addition, Blackburn will report to the Federal Election Commission that she has $4.62 million in cash on hand to spend for the race.
Blackburn's fundraising is much larger than that of former Rep. Stephen Fincher, who is also running for the Republican nomination. Fincher is set to report raising $1.45 million in a 70-day period, the Tennessean reported.
In her statement, Blackburn’s campaign pointed out that it had five times as many Tennessee donors as Fincher.
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Both are running to replace Sen. Bob Corker, who announced last year he would not seek re-election.
Last month, former Demcoratic Gov. Phil Bredesen announced he would run, but has yet to announce his fundraising numbers. Bredesen is considered the best possible Democratic candidate to pick up the seat in Republican Tennessee.
All candidates have to report their fundraising from Oct. 1 to Dec. 31 by the end of January.