You're half-right about Pelosi. Rather, that it doesn't really matter whether her cognition has declined or not. Though do not mistake me for supporting her.

The Democratic party is littered with elder statespersons who have surpassed their cognitive prime - now just a pale echo - to really effectively rule and govern the country. To adapt to new politics and policies, or serve as the liberal classes function to ameliorate capitalist market externalities with state intervention and relief. But it's not their aged condition which inhibits these responses - Feinstein demonstrates that their staffers can simply drag them - but a lack of mass movements and popular political vision.

Trump might have been president but Covid happened under control of Congress by the Democrats, and for two years it led, under Democratic leadership, to over a million dead and the only pittance provided by the federal government was 2k USD, student debt + medicaid extensions.

Democrat's fetishization to preserve the status quo of social murder, exploitation, and increasing pressure and financial ruination on working Americans through timid, limited, or absentee action is in fact, not made possible by sycophants like yourself. Rather, it's just a symptom of a society without hope or agency of action.