Mark Cuban thinks Donald Trump is lying about how rich he is.

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Donald Trump released a new campaign finance report this week and in addition to showing he may have paid thousands of dollars to a fictional ad firm from Mad Men, many pundits are saying the report shows the presidential candidate is not doing as well in fundraising as would be expected.

Fellow rich person Mark Cuban is no fan of Trump, having previously questioned the financial viability of his run for office, and on Tuesday he called out the White House hopeful again on Twitter.

Cuban also took the liberty of retweeting his early statements about Trump’s pecuniary health.

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Trump has yet to respond to Cuban’s taunts but the reality star and real estate developer rarely misses an opportunity for a Twitter fight.