Sure, if you look at it on purely statistics, rather than actually looking at the teams. The Senators do not have a Vlasic to put out against McDavid.
Seems to me they don't need one with Karlsson keeping him quiet, two Politician wins vs the Oilers as well.
Karlsson seemed to do a better shut down job than the aforementioned Vlasic and Braun this season:
Let's grab another one:
5v5 minutes versus Crosby:
28:30, one Crosby goal, one Karlsson assist. Not bad.