No we can not. While the LDS church head-quartered in Salt Lake City does not currently allow members to marry polygamously they do not find it to be inherently wrong. The only “objection” the LDS church has against it is that they were told it is now “un-lawful”. The issue of polygamy for them is not one of right or wrong but of allowed or not allowed. The Catholic church teaches that polygamy is an offense against marriage the LDS sees it as a valid form of marriage when allowed. So no they are not even close to seeing eye to eye on what constitutes a sacramental marriage.
Also the LDS church has never “denounced” polygamy, from
dictionary.com:
They have never declared it wrong or evil, how could they their founder was a polygamist with 33 wives.