Rosie O'Donnell used her guest-hosting debut on "Jimmy Kimmel Live!" to mock Donald Trump, sarcastically thanking him for reviving her career through their long-running feud while accusing him of bringing back "fascism and the measles." The appearance underscores how O'Donnell, a former co-host of "The View," has leaned into her rivalry with the US president as a platform for renewed public attention and anti-Trump commentary during her stint filling in for Kimmel.

The segment took place on the second night of O'Donnell's guest-hosting run in Los Angeles, continuing a personal dispute between the pair that stretches back roughly two decades. Fox News reported that O'Donnell had previously said she was "surprised" to be asked to guest host but was keen to use the opportunity as an anti-Trump platform, with the broadcast forming part of wider coverage of her late-night comeback reigniting the long-standing feud.