The Washington Nationals awaited word last night on their potential deal for Colorado Rockies outfielder Preston Wilson, with club officials hoping they could complete the transaction in time to get Wilson to Milwaukee tomorrow for the first game following the all-star break. Meantime, the Nationals showed serious interest in left-handed reliever Mike Stanton, discarded by the New York Yankees, and he could be added to a tiring bullpen for the stretch run. The hitch in the Wilson deal, a source said yesterday, remains the amount of money the Rockies would like the Nationals to pay on Wilson's contract. The amount is likely to be between $2 million to $2.5 million, the source said, but the clubs were discussing how best to structure the financial part of the deal. The Chicago Cubs also are pursuing Wilson. The Nationals would send to Colorado pitcher Zach Day, who still is valued by some in the organization despite his 6.75 ERA this season, and minor league outfielder J.J. Davis, who began the season on the Washington roster. Nationals General Manager Jim Bowden covets Wilson for his power potential. Hitting in the thin air at Denver's Coors Field, Wilson hit .258 with 15 homers and 47 RBI prior to the all-star break, with 10 of the homers and 34 of the RBI coming at home. He also has 77 strikeouts in 267 at-bats, ninth in the National League.