If a U.S government official is not anti-abortion and a Republican, then a U.S government official is neither anti-abortion nor a liberal.
All Republicans are anti-abortion. Either Republicans or Democrats.  No Democrats are conservative. Either conservative or liberal.  A U.S government official is either conservative or a Republican.
∀x (Republicans(x) → Anti-abortion(x))  ∀x (Republicans(x) ∨ Democrats(x))  ∀x (Democrats(x) → ¬Conservative(x))  ∀x (Conservative(x) ∨ Liberal(x))  Conservative(anU.SGovernmentOfficial) ⊕ Republicans(anU.SGovernmentOfficial)