Conservative radio host and former lawmaker Joe Walsh is the second man to question President Donald Trump for the White House 2020 nomination of the Republican Party.
"The country is fed up with this man's tantrum." Mr Walsh, 57, told ABC's This Week, which is considered a long-term challenge.
President Trump did not comment directly on the news.
Former Massachusetts Governor Bill Weld Announced Challenge in April
Both men face a tough fight over the takeover of a Republican party that has been redesigned on the model of Trump.
No sitting president of modern times has lost the race for nomination for his own party.
But both Jimmy Carter (1
What else did Joe Walsh say? It needs strengthening and there has to be an alternative, "he told ABC.
Mr. Walsh was elected to the Illinois House of Representatives in 2020 when he was at the tea party wave.
The Tea Party Movement is a conservative group within the Republican Party.
Who will face Trump in 2020? [IDP] Election day is still more than a year away, but the race to become Mr. Trump's Democratic challenger is already in
Joe Biden and Bernie Sanders threw their hats into the ring, but most of the other candidates are relatively unknown outside the Washington DC bubble.
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