Taiwan's ruling party is accusing China of reaching into the United States to spy on the family of President Lai Ching-te — a bad sign for cross-strait relations and for Taiwanese living abroad.

• The FBI arrested a woman at Los Angeles airport who is accused of working as a Chinese agent and watching Lai's son, Lai Ting-yu, while he was in the US.
• Taiwan's DPP condemned the move, saying Beijing has now targeted the family of a sitting head of state.
• The party says China's list of targets keeps growing — from dissidents and artists to the president's own relatives — using helpers overseas to gather information and intimidate people.
• The DPP told Beijing that if it really wants cross-strait talks, it must stop pressuring Taiwanese people and their families abroad.

Outlook: Expect sharper friction between Taipei and Beijing, and more pressure in Washington to crack down on Chinese operations on US soil.