Trump promises lawsuit over Louisiana delegates
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Republican presidential front-runner Donald TrumpDonald TrumpConway: ‘Trump effect’ has taken over Washington New York Times columnist: Marches 'can never be an effective opposition' to Trump Senate committee clears Carson nomination 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 CruzTed CruzTrump's America: Businessmen in, bureaucrats out When Trump says 'Make America Great Again,' he means it Booker is taking orders from corporate pharmaceuticals 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 RubioThe Memo: Searching for firm footing as Trump Era begins Overnight Energy: Senate panel clears Tillerson for State Senate panel votes to confirm Tillerson 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.