Though I think fusion is not a short term viable option for commercial energy production. There is another way of doing this though. Fusion using helium 3 is most likely to produce a commercially viable reactor. But the problem is, there is hardly any helium 3 on the earth. We can produce it in another reactor, but the cost would be beyond commercial sustainability. However, there is theoretically a considerable source of helium 3 on the moon. Helium 3 is a product of solar wind that is mostly deflected by the earth's magnetic field. So it does not accumulate here. But the moon has no way of deflecting solar wind, so helium 3 can and does accumulate in the lunar regolith. This could actually make a return to the moon economically feasible. The most likely candidate for a commercially feasible fusion reactor would use helium3. It appears to be the most efficient means of creating distributable energy from a fusion based energy economy.
But I still think thorium is a better and cheaper solution.