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Fox News senior political analyst Brit Hume explained on "Special Report With Bret Baier" Monday night why Tea Party Republicans originally started their confrontation with Democrats over the bid to defund ObamaCare.

He argued that they're taking an unconventional approach, because the mainstream GOP has "utterly failed" to stop the growth of government.

Hume said:

"Veteran political observers on both the left and right are still trying to figure out what the House Tea Party caucus and its Senate pied piper Ted Cruz were thinking when they insisted on using the threat of a government shutdown to defund ObamaCare.

"It was a hopeless strategy that has not only failed in its stated goal, but helped send the Republican Party to its lowest favorability ratings ever.

"In conventional terms, it seems inexplicable, but Senator Cruz and his adherents do not view things in conventional terms. They look back over the past half-century, including the supposedly golden era of Ronald Reagan, and see the uninterrupted forward march of the American left. Entitlement spending never stopped growing. The regulatory state continued to expand. The national debt grew and grew and finally in the Obama years, exploded. They see an American population becoming unrecognizable from the free and self-reliant people they thought they knew. And they see the Republican Party as having utterly failed to stop the drift toward an unfree nation supervised by an overweening and bloated bureaucracy. They are not interested in Republican policies that merely slow the growth of this leviathan. They want to stop it and reverse it. And they want to show their supporters they'll try anything to bring that about.

"And if some of those things turn out to be reckless and doomed, well so be it."