Did Joseph Smith practice polygamy?
No. Joseph Smith is on record repeatedly preaching against polygamy as well as denying it. If Joseph practiced polygamy he would have been cowardly, a liar and in adultery. Polygamy was against the Book of Mormon, Doctrine and Covenants and other revelations received to the church on monogamy. I’m not aware of Joseph being cowardly with anything he received from God such as the Book of Mormon.