Article continues below advertisementIn the midst of an ongoing feud with President Donald Trump, late-night host Jimmy Kimmel used his platform at the ABC Upfronts presentation to brag that his show's viewership was up 25 percent among adults aged 18 to 49, sarcastically thanking "our partners in Washington" for driving the surge.Nielsen data backed up the flex, revealing that Jimmy Kimmel Live! experienced major viewer spikes immediately following Trump's public demands for his firing.