Trump promises lawsuit over Louisiana delegates
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Republican presidential front-runner Donald TrumpDonald John TrumpHouse Democrat slams Donald Trump Jr. for ‘serious case of amnesia’ after testimony Skier Lindsey Vonn: I don’t want to represent Trump at Olympics Poll: 4 in 10 Republicans think senior Trump advisers had improper dealings with Russia MORE late Sunday promised to sue over delegate allocation from the Louisiana primary.

Trump in a tweet called Republican primary politics “unfair.”

In an interview earlier Sunday, Trump blasted a report that rival Ted CruzRafael (Ted) Edward CruzDebbie Wasserman Schultz marks 10 years as breast cancer survivor Foreign agent registration is no magical shield against Russian propaganda Let Trump be Trump and he'll sail through 2020 MORE will pick up extra delegates from the contest.

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“Welcome to the Republican Party,” Trump said on ABC’s “This Week." “What’s going on in the Republican Party is a disgrace.”

"I won Louisiana and now I hear he's trying to steal delegates," Trump said, referring to Cruz.

"I have so many more votes and so many more delegates," Trump added. "And, frankly, whoever at the end, whoever has the most votes and the most delegates should be the nominee."

Cruz could end up getting 10 more delegates from Louisiana than Trump, according to The Wall Street Journal.

The newspaper reported that Cruz is likely to pick up the five delegates left behind when Marco RubioMarco Antonio RubioRyan pledges 'entitlement reform' in 2018 Richard Gere welcomes lawmakers' words of support for Tibet Dem lawmaker gives McConnell's tax reform op-ed a failing grade MORE ended his campaign as well as the state's five unbound delegates who can back a candidate of their choosing.

Cruz spokesman Ron Nehring late Sunday tweeted that Trump's time might be better spent "reading rules" instead of sending "hate-tweets."

This report was updated at 7:06 a.m.