Republican presidential candidate Donald Trump speaks at a campaign event Sunday, Feb. 21, in Atlanta. | AP Photo Trump warns Cubs owner about spending against him

Donald Trump is warning the family who owns the Chicago Cubs over spending against him.

Marlene Ricketts, an owner of the Chicago Cubs, donated $3 million to Our Principles PAC according to FEC filings. The PAC -- which is run by former Mitt Romney adviser Katie Packer -- has a sole goal of taking down Trump.


The New York billionaire tweeted Monday “I hear the Rickets [sic] family, who own the Chicago Cubs, are secretly spending $'s against me. They better be careful, they have a lot to hide!”

I hear the Rickets family, who own the Chicago Cubs, are secretly spending $'s against me. They better be careful, they have a lot to hide! — Donald J. Trump (@realDonaldTrump) February 22, 2016

Ricketts and her husband, Joe, who founded TD Ameritrade, previously supported the candidacy of Scott Walker, donating more than $5 million to the Unintimidated super PAC supporting the governor of Wisconsin, who exited the race last September.

Few have spent or raised large sums of money against Trump. According to FEC filings, Ricketts is one of just three people who donated to the PAC.