Quoting: DustinBrown1989
You could resign Nylander obviously
Cool, with what money? Nylander obviously will command at least 9.5 million and Washington:
Has Wilson's contract kicking in
Needs to re-sign McMichael, Sandin, Protas who will all likely command raises
Still have Oshie and Backstrom under contract (combined 14,950,000 dollars between the two)
Given the Caps current situation (84 million in salary), even with subtracting Mantha (expiring) and adding 3.5 million to the cap, Washington would only have 9.2 million in cap space, not nearly enough for Nylander and especially not enough when Sandin, Protas, and McMichael need new deals. It's also never a given that someone signs where they get traded to, especially when Nylander could command 10 million on the open market. Its not feasible for Washington without a loss and trading Leonard for someone who likely walks at the end of the year just isn't going to happen.
Edit: Did not mention Edmundson expiring but his money is cancelled out by Wilson's extension.