Eileen Wang, the mayor of Arcadia, was charged in April to a single felony count of acting in the United States as an illegal agent of a foreign government, the US Attorney's Office in the Central District of California said on Monday. The charge carries a maximum term of 10 years in prison in the US. A19-page plea deal was unsealed with the charging document on Monday. Wang resigned as mayor within hours of her case being made public, Arcadia City Council's website showed.