Presidential? Yea you would think. But seeing this map overlayed with districting lines would help explain how we get some of our senators representatives we have.
Districting lines have nothing to do with Senate elections - senators are whole state affairs. Districting lines only affect two things at the federal level - House elections and presidential electors in two particular states that grant one elector based on the results within each House district and two based on overall state vote.
Fair fair, I am not even a armchair expert. And yea a moment of thought about senator I ever voted for would have reminded me thay. But at least I wasn't crazy about the house.
Now, I still think any election however local, does affect stuff up the ladder.