Nikki Haley Nimrata (Nikki) Haley'The soul' versus 'law and order' Author Ryan Girdusky: RNC worked best when highlighting 'regular people' as opposed to 'standard Republicans' GOP lobbyists pleasantly surprised by Republican convention MORE, former GOP South Carolina governor and United Nations ambassador, is expected to endorse Sen. Kelly Loeffler Kelly LoefflerLoeffler calls for hearing in wake of Netflix's 'Cuties' Georgia Senate campaign could bring Black political redemption Democrats seek Harris boost in Senate race MORE (R-Ga.) in her special election battle against GOP Rep. Doug Collins Douglas (Doug) Allen CollinsWin by QAnon believer creates new headaches for House GOP Andrew Clyde wins Georgia GOP runoff to replace Doug Collins New poll shows tight presidential race in Georgia MORE (R-Ga.) on Monday, a source familiar with the announcement confirmed to The Hill.

Haley teased the anticipated announcement in a video posted to Twitter on Wednesday.

“Hi Georgia friends, it’s Nikki Haley and I am coming to Atlanta on Monday with a super exciting announcement. I hope you’ll stay tuned — I look forward to seeing you soon. Take care,” she said in the video.

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Atlanta, we are coming to you with a fun announcement on Monday. Look forward to seeing you! Details coming soon! pic.twitter.com/5aWKab0wvZ — Nikki Haley (@NikkiHaley) March 4, 2020

The Senate battle in Georgia has become increasingly heated, fueling intraparty attacks, with both camps and their allies attempting to tout their preferred candidate's commitment to carrying out President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE’s agenda and portraying their opponent as being too immersed with “Washington insiders.”

Loeffler, a wealthy financial executive, was appointed by Gov. Brian Kemp (R) to fill the seat of Sen. Johnny Isakson Johnny IsaksonBottom line New poll shows tight presidential race in Georgia Matt Lieberman faces calls to drop out of Georgia Senate race over 'racist and discriminatory' tropes in 2018 book MORE (R-Ga.) after he stepped down at the end of last year due to a series of health issues.

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Trump had lobbied Kemp to appoint Collins — who played a leading role in defending the president during the impeachment proceedings as the top Republican on the House Judiciary Committee — to the seat in November, but the Georgia governor ultimately opted to appoint Loeffler. Trump has since praised Loeffler publicly following her votes to acquit him on House-passed impeachment articles in February.

Sources close to the president told The Hill it’s unlikely Trump will get involved in the race.

Haley’s backing provides Loeffler with another high-profile supporter ahead of the May 19 special election. Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellSenate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll The Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally MORE (R-Ky.), and conservative Sens. Marsha Blackburn Marsha BlackburnDemocrats smell blood with new DHS whistleblower complaint Hillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections GOP senators unveil new bill to update tech liability protections MORE (R-Tenn.), Tom Cotton Tom Bryant CottonLoeffler calls for hearing in wake of Netflix's 'Cuties' Health care in the crosshairs with new Trump Supreme Court list Cruz says he wouldn't accept Supreme Court nomination MORE (R-Ark.) and Deb Fischer Debra (Deb) Strobel FischerHillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections Google, Apple, eBay to meet virtually with lawmakers for tech group's annual fly-in Congress botched the CFPB's leadership — here's how to fix it MORE (R-Neb.) have also announced their support for Loeffler.

Loeffler has also been making an effort to prove her conservative credentials by meeting with key outside groups and hiring staffers from conservative offices — including several who worked with Rep. Mark Meadows Mark Randall MeadowsAmerican Airlines, unions call for six-month extension of government aid McEnany tells CNN reporter to come work at the White House for details on health care plan Trump undercuts GOP, calls for bigger COVID-19 relief package MORE (R-N.C.), one of Trump’s closest confidants in the House — as she faces accusations of being too moderate from the Collins camp.

Numerous state legislators, American Conservative Union Chairman Matt Schlapp, Fox News host Sean Hannity Sean Patrick HannityDershowitz suing CNN for 0 million in defamation suit If Trump doesn't know why he should be president again, how can voters? Trump says he read 'boring' Woodward book 'very quickly' MORE and conservative radio host Mark Levin Mark Reed LevinBarr: The left 'believes in tearing down the system' Tennessee primary battle turns nasty for Republicans Hannity's first book in 10 years debuts at No. 1 on Amazon MORE have announced their support for Collins.