  We look for a mechanism that removes without numerical fine tuning the strong
constraint imposed by the flavor changing neutral current interaction of
leptoquark exchange. If n x n degenerate leptoquarks couple universally to n
generations of quarks and leptons in the weak basis, not only can the neutral
current interactions be flavor diagonal, but also the charge current
interaction takes exactly the same form as W exchange at low energies. Atomic
parity violation still imposes tight constraints. Electroweak doublets with
some left-right symmetry have the best chance to be the lightest leptoquarks.
