President Trump is facing criticism for going after Republican Senator John McCain over the "no" vote on repealing Obamacare.

President Trump is facing criticism for going after Republican Senator John McCain over the "no" vote on repealing Obamacare. 
In the wake of Trump's remark at the Conservative Political Action Conference on Friday, CNN's Don Lemon said, "it's a low blow, it's unnecessary. He should be ashamed of himself and the people there should be ashamed of themselves."
Trump mentioned McCain while lamenting the failure of the GOP health care legislation.
"Except for one Senator, who came into a room at 3 o'clock in the morning and went like that — we would have had health care," the president said, while imitating McCain's thumbs-down gesture from the vote.
And the CPAC crowd responded by booing McCain, who's battling brain cancer. 
Trump continued, "I don't want to be controversial, so I won't use his name."
Matt Schlapp, chairman of the CPAC-hosting American Conservative Union, defended the crowd's reaction, tweeting, "folks were booing his vote to retain obamacare. That's worth a boo."
In response, the ailing senator's daughter, Meghan McCain, posted a tweet on Saturday.
"Given what my family is going through right now and what my father has given to this country I would expect better from both you and the crowd, Matt. But please, continue making excuses for the inexcusable," she wrote on Twitter.