(CNN) President Donald Trump's presidential campaign spent more than $150,000 on purchases from Amazon, the company now facing his ire amid claims it doesn't pay its fair share of shipping costs and taxes.

A report by CBS News digging into Federal Election Commission records found that in 2015 and 2016 the campaign spent $158,498.41 in 379 transactions classified as office supply purchases. The committee continued after the election to spend money on the website, purchasing more than $2000 in 2017.

Trump has repeatedly attacked Amazon and the Washington Post, both of which are owned by billionaire Jeff Bezos.

"While we are on the subject, 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 tweeted Saturday morning.

"The Failing N.Y. Times reports that 'the size of the company's lobbying staff has ballooned,' and that......does not include the Fake Washington Post, which is used as a 'lobbyist' and should so REGISTER," the President wrote. "If the P.O. 'increased its parcel rates, Amazon's shipping costs would rise by $2.6 Billion.'"

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