es·pouse 
/ɪˈspaʊz/ verb
es·pous·es; es·poused; es·pous·ing /ɪˈspaʊz/ verb [+ obj] formal : to express support for (a cause, belief, etc.)
▪ The new theory has been espoused by many leading physicists. ▪ Those espousing unpopular views were often excluded.
▪ The new theory has been espoused by many leading physicists. ▪ Those espousing unpopular views were often excluded.
— es·pous·er noun, plural es·pous·ers [count]
▪ an espouser [=supporter, proponent] of liberal causes
▪ an espouser [=supporter, proponent] of liberal causes
