Article continues below advertisementTomi Lahren was put on blast for mocking former President Joe Biden's winter holiday vacation. The conservative activist, 33, who ironically was filling in for Fox News host Sean Hannity during a recent broadcast, trashed the politician, 83, on December 30. Article continues below advertisementSource: @Acyn/XA video of Tomi Lahren on Fox News has gone viral."You'll never believe where Joe Biden was spotted," Lahren said on Hannity's eponymous news show. "Spoiler alert: He's on vacation.