I've noticed this previously. Duckworth narrowly won ancestrally Democratic Gallatin County, which Trump carried with more than 70% of the vote. Another prominent example of this phenomenon is in Kentucky, where Jim Gray, who lost to Rand Paul by 14%, won Elliott County by a virtually similar margin, while Trump carried it with more than 70% against Clinton.
Even in my home state of Colorado, there were some Trump-Bennet voters. Bennet won Huerfano, Pueblo, Las Animas, and Conejos Counties, which Clinton lost to Trump, and generally outperformed Clinton throughout most of Colorado with the exception of a handful of white liberal dominated places-like Boulder, San Juan, and Pitkin Counties. Overall, Bennet received about 32,000 more votes than Clinton did.