2018 holiday sales grew 2.9 percent amid turmoil over trade policy and delay in data collection.
NRF forecasts retail sales will grow between 3.8 and 4.4 percent.
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.
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