NRF sent a letter to the White House urging the administration to forgo the increase.
The average shopper spent $313.29 on gifts and other holiday items over the five-day period.
Fifty percent of consumers who own smartphones or tablets said they would use them to research their holiday purchases.
Consumers will spend 4.1 percent more than last year during winter holidays, according to NRF survey.
NRF forecasts holiday sales will increase between 4.3 and 4.8 percent.
The inaugural contest celebrates some of the most innovative products in retail.
The NRF issued a statement from President and CEO Matthew Shay.
The National Retail Federation says tariffs remain a threat.
Retailers say latest tariffs throw away benefits of tax reform.
The National Retail Federation said the tariffs amount to doubling down on the recklessness.
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