President Donald Trump is targeting Sen. Mitch McConnell (R-KY) after the lawmaker voted “no” on Robert F. Kennedy Jr. for health secretary.

Kennedy Jr. to head the U.S. Health and Human Services Department on a party-line vote, with Mitch McConnell the only Republican voting against the controversial appointee opposed by every Democratic Senator.

President Donald Trump seemed to question a well-documented part of Sen. Mitch McConnell's life -- his childhood battle with polio -- after the Kentucky Republican opposed vaccine skeptic Robert F. Kennedy Jr.

Ahead of his retirement announcement, Sen. Mitch McConnell voted against confirming a few Trump Cabinet picks. Here's what to know.