Which political leader expressed concern about this, and suggested that abolishing race-based admissions could lead to this (in his view unfortunate) result?

I should note that while the concern was hyperbole -- though universities of course could fill their freshman classes with Asian-Americans, race-blind admissions would not lead to such an outcome -- this year for the first time Asians outnumbered any other racial group, including whites, among students admitted to all University of California schools. (This had already been the case as to some schools.)

My reactions:

(1) UC doesn't "look like California." In fact, as simple arithmetic will tell us, when Asians are "overrepresented" this way compared to their fraction of the California college-age population, whites and other racial groups are substantially "underrepresented." Yet that's surely no reason to institute race preferences;

(2) Asian-American culture is obviously doing something right. Others, including whites like me, should do what they can to copy those aspects of Asian-American culture that promote this.