Delay and defund. And default.

That is the House Republicans’ brilliant plan in their last-ditch effort to block implementation of the Affordable Care Act. It is a plan that threatens to grind the government to a halt and wreak havoc on the economy.

If they can’t take over Washington, they’ll shut it down. It’s their way or no way. All or nothing.

This is what has become of a party hijacked by zealots.

It would be tempting to blame all Republicans for this absurdity, but that would be unfair. There are still Republicans who are interested in good governance, but they’re being dragged to the nether regions of nonsensical policy making by younger, more ideological members of Congress, many from safely gerrymandered districts that form virtual echo chambers of irrationality.

The old guard has warned against the recklessness of the tactics of far-right House Republicans.

John McCain told CNN on Thursday: “In the United States Senate, we will not repeal, or defund, Obamacare. We will not. And to think we can is not rational.”