Complex sentence: A spokesman for Governor Walker said that Cass had been in Washington DC at the time and was hence not included in the formal list of applicants; however, several other candidates were also out of the state at the time but were still listed.
Split into simpler sentences: A spokesman for Governor Walker said that Cass had been in Washington DC at the time and was hence not included in the formal list of applicants. However, several other candidates were also out of the state at the time but were still listed.