The Senate Leadership Fund is a United States Super PAC which describes itself as "the only outside organization solely dedicated to protecting and expanding the Republican Senate Majority".
The PAC registered Peachtree PAC in 2020 and spent over $35 million between November 6, 2020, and December 31, 2020. Peachtree spent $12,417,180.41 opposing Jon Ossoff and $12,417,180.41 opposing Raphael Warnock along with $6,505,575.64 supporting Kelly Loeffler and $6,505,575.64 supporting David Perdue. A spokesperson for the PAC declined to say who was funding Peachtree.
Source: