(CNN) When Rand Paul took control of the Senate floor just before 6 p.m. Eastern, virtually every one of his Republican colleagues grimaced. Five years ago, they would have cheered him.

Paul's speech, which slowed attempts to pass a massive budget deal before the government shuts down at midnight, was a savaging of his party -- a party that appears to have turned 180 degrees from the deficit hawks of the mid 2010s who insisted that government spending was ballooning out of control and was crippling the country.

"When the Democrats are in power, Republicans appear to be the conservative party," Paul said at one point. "But when Republicans are in power, it seems there is no conservative party. The hypocrisy hangs in the air and chokes anyone with a sense of decency or intellectual honesty."

He is 100% right.

The simple fact is that Republicans in the Obama era defined themselves primarily as committed to reducing government spending and shrinking the nation's debt. The ur-document of that age was Paul Ryan's budget, in which he proudly touted the need to confront entitlement spending and make the hard cuts necessary to keep the country solvent for the foreseeable future.

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