Most top Republican lawyers have no interest in working in that hive of scum and villainy. You’re more likely to find them in the general counsel roles of major U.S. corporations than dealing with scumbags in Washington D.C.
+1
It’s more than a lack of interest. It’s the knowledge that DC is not an accommodating place for top notch Republican lawyers. There’s real bias against them. In corporate settings this is not the case. Naturally many of the best Republican lawyers prefer to practice in an environment is amenable to them.