In the meantime, various panels have committed to do everything from release Trump's tax returns to challenge his zero-tolerance border policy that has resulted in the separation of immigrant children from their parents, as well as their detention. Those probes, however, are not expected to begin in earnest until later this month, after leaders have determined which members will sit on each committee - decisions panel leaders aren't expecting until later next week, due to leaders' immediate focus on ending the partial government shutdown.