I have a question about the word "that" in the following sentence:
nowhere is that more apparent than in unemployment figures in the United States and Japan.
This is originally from a New York Times article (to avoid the paywall, I use a short quote put on the other website):
The meaning of this sentence is not an issue. What I am a bit confused with the role of "that" in the sentence. I thought this "that" is an adverb to indicate "to that degree". However, in a discussion on a message board, other people pointed out that my interpretation would be incorrect because an adverb "that" won't work with a comparative "more". Rather, this sentence should be understood as anastrophe where "that" is the true subject of the sentence and the natural order of words is "that is more apparent nowhere than in".
I probably got it wrong but want to have native English speakers' opinions.