Spokane's not alone in its worries about cross-border competition for business. Oregon retailers are advertising in Olympia, urging Washingtonians to make the two-hour drive to Portland, where there is no sales tax. "Shop Portland: tax-free, every day," read the ads.
Washington's firing back, touting its multi-state, big-jackpot lottery, Mega Millions.
"Drive three miles and cross nine tax brackets," reads a large billboard just across the border in Oregon.

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