"We would really appreciate it if she would be more careful and show respect to every American voter," Senator Claire McCaskill said.
The Missouri Senate race is expected to be one of the most hotly contested of the 2018 midterms.
Who is Craig O'Dear?
There is not yet a formal plan, but what has been seen would disproportionately benefit the wealthy.
The militarization of police forces has gotten out of hand, senators tell federal government officials
General Motors Co came under withering attack for its decade-long failure to notify the public about defective parts linked to fatal crashes