Manchin, D-W.Va., declared Sunday that after months of negotiations, he chose that he could not back Biden's massive social spending bill.
"I think he's saving Biden, because if they ever got that passed, this country would be a total disaster," Trump explained to Fox News. "Already, inflation is so bad, it's at a level that nobody's really seen — nobody remembers for so long — Jimmy Carter was there, but I think this will end up being far worse than Jimmy Carter."
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"I think that Manchin is actually helping Biden from himself, because, if you look at it, and you look at what was potentially going to be passed, and I'm not saying it won't, maybe he'll change his mind, but it would blow this country up, with inflation and with other problems," Trump announced.
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"This country is not able to do what they would like to do," Trump explained of Democrats' goals included in the Build Back Better Act. "It would be very bad for the country."
On Sunday, Manchin said he could not "vote to continue" with the package, stressing that if he cannot demonstrate to his constituents why he would vote for a bill, then he cannot vote for it, despite all of the work he and other Democrats had put in attempting to come to a consensus.
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"This is a no," he announced. "I have tried everything I know to do."
Manchin conceded that aspects of the bill he was in favor of, though it was simply too hefty for him to justify voting for it.
"There's a lot of good, but that bill is a mammoth piece of legislation," Manchin announced, explaining that it is not even being voted on like a normal bill though being pushed through budget reconciliation.
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Manchin had offered a $1.7 trillion price tag for the spending package, though he announced his Democratic colleagues did not make the necessary compromises. He noted that both he and Biden tried hard to make it work.
"What we need to do is get our financial house in order, but be able to pay for what we do and do what we pay for," he stated.
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In the meantime, Senate Majority Leader Chuck Schumer, D-N.Y., in his memo to colleagues early Monday, announced neither Manchin's "delay, nor other recent pronouncements, will deter us from continuing to try to find a way forward."
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"We simply cannot give up," Schumer wrote, continuing that senators "should be aware that the Senate will, in fact, consider the Build Back Better Act, very early in the new year so that every Member of this body has the opportunity to make their position known on the Senate floor, not just on television."