Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.) welcomed billionaire Michael Bloomberg Michael BloombergBloomberg rolls out M ad buy to boost Biden in Florida Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Bloomberg pays fines for 32,000 felons in Florida so they can vote MORE to the Democratic primary race by referring him to her newly launched "Calculator for Billionaires."

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"Welcome to the race, @MikeBloomberg!" Warren tweeted Thursday evening.

"If you're looking for policy plans that will make a huge difference for working people and which are very popular, start here."

Attached to the tweet is a link to Warren's "Calculator for Billionaires," which was released earlier on Thursday.

Welcome to the race, @MikeBloomberg! If you're looking for policy plans that will make a huge difference for working people and which are very popular, start here: https://t.co/6UMSAf90NT — Elizabeth Warren (@ewarren) November 7, 2019

The web tool allows voters to see how much some of the country's most prominent billionaires would pay in taxes under Warren's new tax plan, which features a two percent tax on household net worth between $50 million and $1 billion, and a three percent tax on net worth above $1 billion.

Ironically, Bloomberg, who has a reported net worth of $52 billion, is one of the billionaires you can choose from on the tool. According to Warren's calculator, the 77-year-old former Mayor of New York would pay $3.079 billion in taxes next year.

Bloomberg hasn't officially launched a campaign yet, but sources said Thursday that he is completing the necessary paperwork to appear on Alabama's Democratic primary ballot.