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The Trump administration touched off consternation and confusion over the weekend, issuing, and then apparently rolling back, an announcement implying the president had rescinded his predecessor’s order creating two popular national monuments in California.

Greg Gill, a semi-retired public relations professional and Altadena resident, said the county’s call for volunteers at the park was short on safety details and “touched off a lot of raw nerves.”

On Sunday Mahmoud Khalil, a prominent Palestinian activist and recent Columbia graduate who holds a green card, was arrested by federal immigration authorities, touching off a legal fight over his detention.

New sneaker releases may have touched off at least some of the recent incidents.

The White House canceled a poorly drafted order halting federal payments after it touched off nationwide chaos.