antepusieran
Imperfect subjunctive ellos/ellas/ustedes conjugation of anteponer.

anteponer

La polarización descendió notablemente y eso facilitó que se antepusieran los intereses municipales por encima de los intereses políticos y partidistas. Siendo así, la calidad de los candidatos sandinistas se impuso.
With the polarization diminishing noticeably in the party's campaigns as well, it was easier for the candidates to put municipal interests before political and party ones, and under those conditions, the quality of the Sandinista candidates stood out.
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Christmas carol