Taiwan's ruling party is pushing back before the Trump-Xi summit, warning that Beijing will try to use a 1982 agreement to cut off American weapons sales — bad news for Taiwan's defense if Trump gives ground.

• Xi is expected to press Trump to halt US arms sales to Taiwan, citing the 1982 communique between Washington and Beijing.
• Taiwan's DPP says that deal assumed China would settle the Taiwan question peacefully, and China's military threat has only grown since.
• The same-day "Six Assurances" said the US never set an end date for arms sales and does not need Beijing's approval — and both should be read together.
• The State Department and White House have restated their opposition to coercion, and US, Japanese and South Korean foreign ministers met to voice support for Taiwan.
• Senior Democratic senators urged Trump not to let Xi leave Washington stronger than he arrived.

Outlook: Taiwan will be watching the summit closely for any softening in US language on arms sales or defense commitments.