Depends on what the minimum rate was, since the proposal was offset with the foreign taxes actually paid on the foreign profits. If it was low enough it would be a Republican wet dream and would allow for tax free repatriation from a variety of foreign countries.
A 90% foreign dividends exemption would be equivalent to a 3.5% tax rate on foreign profits, while a 20% minimum tax rate would be a 5% tax on foreign profits from a country with a 15% corporate tax rate, where even a very favorable country like Ireland has a 12.5% tax rate. For a country with a 20% tax rate, it would be 0%.