It can't be love
For there is no true love
It can't be love
For there is no true love
The situations in the two songs are somewhat comparable. In the verses of Ellington's song, the speaker/singer constantly wonders "what it is / That's keeping me in a mizz." There, the "it can't be love" line appears in the bridge. At the end of the White Stripes' song, the speaker/singer recalls that his girlfriend "cried the union forever / But that was untrue, girl / 'Cause it can't be love." Both seem upset about a lost love, but neither wants to admit that the relationship was ever that strong.
I knew about Jack White's interest in old blues records because of the vinyl re-releases that his Third Man Records put out. Ellington is more jazz than blues, but between White's interest in older music and the fact that the lines are exactly the same, I think this is an intentional quotation of "In a Mizz."