Due to various territorial rearrangements, in 2060, the largest seaport in the United States is Churchill, Manitoba. A much reduced but still significant volume of shipping needs to reach the country through the Arctic from the east or west. Accordingly, some effort has been put into keeping the ice melted or broken along the route.
To accomplish this goal, a fleet of statites has been launched - small cubesats that unfurl into big solar sails. These solar sails are not reflective, but absorb sunlight with high efficiency and use it to power near-infrared lasers, which they aim with great precision along the route. The statites have deployed themselves (via solar sailing) to positions where they can stay fixed in the sky due to the propulsion from the absorption and emission of light (probably fairly far out into space). Nonetheless they remain instantly maneuverable and capable of a communications network, so that for example they can begin melting fresh channels into moving ice to maintain a constant passage without having to heat all of the ice that moves past.
In terms of cost, I'm supposing that roughly double the area of statite is needed compared to the shipping route. If the NEA Scout with 85 m^2 of sail for what I infer could be little more than a cubesat launch cost of 100,000 USD (though that prototype cost much more), then I get that an 85 meter wide trade route is going to cost roughly 200,000 USD per meter. I don't know if you'd need to heat 2000 km or much more, and there's a peak pricing situation here where if some of the route can be neglected at any given time the cost would be much less. But it's something like a 400 billion USD price tag - not bad when you consider it doubles as a distributed orbital death ray when called for. If the sails can be made ten times thinner and the launch cost can be cut 10-fold with reusable space tourism rockets that attach to an orbiting space tether to make the last step into space, who knows, it may be cheaper than JWST.
Doable, or daydream?