It wasn’t so long ago that the idea of the Ottawa Senators trading Erik Karlsson seemed nearly impossible. What a difference a few weeks can make. It goes without saying that every team wants a player like Karlsson. But which ones actually have a shot? Sportsnet insiders Elliotte Friedman, Chris Johnston, and Nick Kypreos shared the latest reports during Saturday’s Headlines segment on Hockey Night in Canada. “Whatever gets said, the belief is the Ottawa Senators want to try to make this happen and Erik Karlsson wants it to happen, and they have been grinding away in the last two or three days to see if they can,” Friedman said. “Obviously Tampa Bay is a leading contender, I think they’ve thrown several different proposals at each other.” The Lightning’s position as a strong Stanley Cup contender makes them an appealing franchise for one of the top rearguards in the league, and much has also been made of Karlsson’s friendship with fellow Swede Victor Hedman, which was on full display during the NHL All-Star Weekend last month. “The one thing is … teams believe there are stealth contenders out there — teams that haven’t been in the news,” explained Friedman. “One of them that has popped up a bit is Nashville.” The Predators already have an incredible foursome on their blue line, and we’ve learned that GM David Poile isn’t afraid to make a splash on the trade market, though Friedman cautioned that some teams think Poile “is just trying to drive up the price for others.”