<p>SAN FRANCISCO (AP) — A California state senator who authored gun control legislation asked for campaign donations in exchange for introducing an undercover FBI agent to an arms trafficker, according to court documents unsealed Wednesday. The allegations against Democratic State Sen. Leland Yee were outlined in an FBI affidavit in support of a criminal complaint. The affidavit accuses Yee of conspiracy to deal firearms without a license and to illegally import firearms.</p>