The former Gravity Payments boss rose to prominence with the introduction of the $70,000 minimum wage for his company and with a splashy social media presence.
Health officials say recalling onions – the suspected source of contamination – would help reduce the risk to consumers. Other large fast food chains have also stopped offering onions.
Officials said onions served on top of the popular burger were the likely source of an E. coli outbreak that killed one person and sickened many others.
President Vladimir V. Putin, hoping to prove he is not the pariah the West has tried to make him, this week welcomed leaders from China, India and Iran, among other nations. Then there was the NATO member.
Turkey's Interior Minister said it was "most likely" the Kurdistan Workers' Party that carried out the assault on Turkey's vast aerospace industries complex near Ankara.