This is routine diplomatic positioning between Cuba and the US with no constitutional implications. Cuba stating willingness to talk 'but not about regime change' is standard diplomatic rhetoric that has been repeated for decades. No US constitutional drivers are triggered: no election interference, no rule of law changes, no separation of powers issues, no civil rights impacts, no institutional capture, no corruption, no violence. The 'Trump ramps up pressure' framing adds minimal hype (B=3.1) but this remains far below distraction thresholds. The mechanism is labeled 'policy_change' but no actual policy change has occurred - this is merely a statement of negotiating position. International scope with moderate population affected, but zero constitutional damage domestically. This is classic diplomatic noise - countries stating their red lines for negotiations is routine statecraft, not a constitutional event.