Yes, during this time and for at this moment, U.S still staying at neutral possition for Free Navigation Route in SCS. However China keeps going crazy and things are turns bad then U.S could changes its mind.
Yes, during this time no U.S troops staying in Subic, Cam Ranh. I don't know about Philippines, However, Viet Nam has people willing to fight and its fight for best.
Yes, during this time U.S has zero aids for Viet Nam nor Philippines to against China, However, things are escalated and Free Nagivation Route could not happens, then U.S will supplies whatever its needed to be.
Gambit did not claims anything, he just try to correct you from wrong to right, However, you miss guided then turns out that you put words in his mouths.