WASHINGTON (AP) — President Donald Trump has claimed complete vindication from a congressional memo that alleges the FBI abused its surveillance powers during the investigation into his campaign's possible Russia ties. But the memo also includes revelations that might complicate efforts by Trump and his allies to undermine special counsel Robert Mueller's inquiry. The four-page document released Friday contends that the FBI, when it applied for a surveillance warrant on a onetime Trump campaign associate, relied excessively on an ex-British spy whose opposition research was funded by Democrats.