Of course.
A more interesting question is 20. Even if they do flip the Midwest, that probably isn't enough to counter Texas. I think they have to flip New York and Illinois, and that will take time and a lot of evolution from each parties base.
Yeah, this is what I was thinking too, especially if we changed/clarified the question to specify that TX would become "Titanium D" over night.
Historically, we have seen parties win 5 straight presidential elections, but never 13 straight. The closest we've come is the period from 1860 to 1928 when Republicans won 14 out of 18 elections.