The phrase "a polemical issue" is correct and usable in written English.
It can be used to describe a topic or subject that is controversial and likely to provoke strong opinions or arguments.
Example: "The debate over climate change remains a polemical issue, dividing experts and the public alike."
Alternatives: "a contentious topic" or "a controversial matter".
Riquelme is a polemical topic in his homeland, a masculine version of a latter-day Eva Perón.
But it is also important that pupils are given intellectual challenges, so that they can confront these issues effectively – more effectively perhaps than previous generations did, for whom religion has become in some instances a bitter and polemical issue.
The polemical issue was not so much about the value of the two works as about whether, and to what extent, the classical models for drama developed by the Ancients must be imitated.
Ahead of every Games, there are polemical issues, but during the Olympics the celebration is so big and nice that all the polemics are put aside, at least for a moment".
Mr. Bainwol's experience in navigating polemical issues like copyright infringement and intellectual property were among the skills praised by the alliance in its official statement, skills that Mr. Bainwol surely will employ at his new post.
"Love Sick" occupies a middle ground between the insipid fantasies of B.L. genre and the slice-of-life approach of serious dramas about gay youth that take a polemical tone advocating tolerance — an issue with a blunted impact in societies that not only accepted but idealized homosexual liaisons until the modern era.
For all the zealotry on display, "12th & Delaware" is about as far from a polemical screaming match as a movie about such a divisive issue could be.
Again, the result reads more like a polemical review, both cavalier and superficial.
It was a polemical reaction.
It was a polemical overstatement.
