The leaving U.S. churches will be joining their Conservative brethren in Africa and Asia, which in terms of membership are globally larger than the Liberal U.S. UMC Churches. The UMC in the U.S. will remain the largest Methodist denomination in the U.S., but not globally.
RE: The leaving U.S. churches will be joining their Conservative brethren in Africa and Asia
The GLOBAL METHODIST CHURCH has been formed as an alternative to the UMC.
See here: