'An energy drain like I've never seen'

 Three lower courts have ruled against the administration. After the Supreme Court hears arguments on Wednesday it will have until June to issue its decision, although most expect a ruling to come by January.

Whatever it decides has implications for an estimated $90bn worth of import taxes already paid - roughly half the tariff revenue the US collected this year through September, according to Wells Fargo analysts.

Trump officials have warned that sum could swell to $1tn if the court takes until June.

Cafe Campesino

Trip Pomeroy, chief executive of Cafe Campesino, one of the 23 roasteries that owns Cooperative Coffees, on a recent trip to Peru with a partner farmer

If the government is forced to issue refunds, Cooperative Coffees will "absolutely" try to recoup its money, said Mr Harris, but that would not make up for all the disruption.

His business has had to take out an extra line of credit, raise prices and find ways to survive with lower profits.

"This is an energy drain like I've never seen," said Mr Harris, who is also chief financial officer of Cafe Campesino, one of the 23 roasteries that own Cooperative Coffees. "It dominates all the conversations and it just kind of sucks the life out of you."