known to have a significant advantage in presidential elections due to the Blue Wall and [...]
So far as I can make out, "Blue Wall" is just a slightly colourful way of saying "there are some states that have a solid Democratic majority", and doesn't indicate any advantage except in so far as being more popular is an advantage. In the only US presidential election of the last century (I didn't look further back) in which the outcome didn't match the popular vote, the Democrats won the popular vote and the Republicans won the election. (Very narrowly in both cases.)
In the only US presidential election of the last century (I didn't look further back) in which the outcome didn't match the popular vote, the Democrats won the popular vote and the Republicans won the election. (Very narrowly in both cases.)
The Blue Wall is considered to be a recent development, so looking at history doesn't really tell you much. It's something that has built up gradually but only really been a significant advantage for Democrats for maybe 2 presidential cycles. Basically the Republicans have to win a lot more swing states than Democrat...
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