Khan sparked a row when he said "the underwear beneath is khaki" while allegedly referring to BJP's Rampur candidate Jaya Prada.
Notably, an FIR has been lodged against him.
Here's what went down.
Backstory: In Akhilesh's presence, Khan made problematic comment
Khan, who is grand alliance's candidate for Rampur, went on a rant while addressing a rally in the constituency.
In an apparent reference to his aide-turned-rival Jaya, Khan said it took him only 17 days to learn that "underwear the person wears is khaki". Khaki is usually used to refer to RSS, BJP's ideological mentor.
Don't make the mistake of staying silent: Swaraj told Mulayam
As the row raged on, Swaraj drew Mulayam's attention to it.
The senior BJP leader tweeted, "Mulayam bhai, you are the patriarch of the Samajwadi Party. The Draupadi of Rampur is being disrobed in front of you. Don't make the mistake of staying silent like Bhishma."
Earlier, BJP spokesperson Chandra Mohan said Khan's real face was revealed for everyone to see.
Swaraj also tagged Akhilesh in her tweet
मुलायम भाई - आप पितामह हैं समाजवादी पार्टी के. आपके सामने रामपुर में द्रौपदी का चीर हरण हो रहा हैं. आप भीष्म की तरह मौन साधने की गलती मत करिये. @yadavakhilesh Smt.Jaya Bhaduri, Mrs.Dimple Yadav.pic.twitter.com/FNO5fM4Hkc