ABC News' David Wright reports: The Clinton campaign is crowing about its new radio ad in South Carolina featuring hoops star Earvin "Magic" Johnson.According to an AP report being circulated by the campaign, Johnson reminsisces about his rookie year as a point guard for the L.A. Lakers, offering some locker room advice to Barack Obama."We won our first game on a last-second shot," he reportedly says in the ad. "I was so hyped. But the captain of my team said, 'Take it easy rookie, it's a long season, it's a long road to the championship.'"He was right," Johnson concludes. Keep that in mind, Mr. Iowa Caucuses.But a quick Google search of the Lakers 79-80 season suggests the analogy may not be so good for the Clinton campaign.The Lakers faced the '76ers that year for the NBA championships. Even though the Lakers star player Kareem Abdul-Jabbar went down with a sprained ankle during the championships, the Lakers prevailed in the best-of-seven series thanks in large part to Johnson's razz-mataz.Johnson went toe to toe with "Dr. J," Julius Erving, scoring 42 points, with 15 rebounds, 7 assists and 3 steals, leading the Lakers to a 123-107 victory in the final game, despite Philadelphia's home-court advantage. Sportswriters still regard Johnson's clutch performance as one of the finest individual games in NBA history.So, yes, it's early. But, then as now, perhaps there's still time for a rookie to show his stuff.