Soaking would be good, but that also swells the roots. That type of plant has thick roots and it would likely become tighter in the pot if you allow the roots to absorb water. So soak it good, and immediately attempt removal. That type of pot, with the rim diameter smaller than the central portion, is a difficult one. When you attempt to remove the plant, apply a twisting motion in addition. First go one way, then the other to determine which works best.
