"Not a level playing field," Trump also said in the tweet that again suggested Amazon has a sweetheart shipping deal with the U.S. Postal Service that "will be changed."
"Only fools, or worse, are saying that our money losing Post Office makes money with Amazon. THEY LOSE A FORTUNE," Trump also said in the tweet.
On Saturday, Trump argued that the online retailer's "scam" shipping deal with the postal service is costing the agency "billions of dollars."
"It is reported that the U.S. Post Office will lose $1.50 on average for each package it delivers for Amazon. That amounts to Billions of Dollars," Trump said over two tweets. "If the P.O. 'increases its parcel rates, Amazon's shipping costs would rise by $2.6 Billion.' This Post Office scam must stop. Amazon must pay real costs (and taxes) now!"