Meaning # 1: Khizr Khan has been a better spokesperson as to why to vote for Hillary Clinton instead of Donald Trump, or at least to vote against Trump, than Clinton herself has been.
Meaning # 2: Khan has put more fear into Donald Trump than John Kasich, Paul Ryan, or perhaps even Hillary Clinton...
Meaning # 3: He's not going away any time soon, either as an eloquent spokesman for what it means to be an American or as a campaign issue.
From the New York Times today:
Khizr
Khan, the soldier’s father, lashed out at Mr. Trump in an interview on
Saturday, saying his wife had not spoken at the convention because it
was too painful for her to talk about her son’s death.
Mr. Trump, he said, “is devoid of feeling the pain of a mother who has sacrificed her son.”...
Mr. Trump told Mr. Stephanopoulos that Mr. Khan seemed like a “nice guy”
and that he wished him “the best of luck.” But, he added, “If you look
at his wife, she was standing there, she had nothing to say, she
probably — maybe she wasn’t allowed to have anything to say, you tell
me.”
“They begin to see this person who can hardly speak correct English, who
has an accent — and they are saying, ‘How dare he say something of that
profound nature?’ Not profound in their eyes, but profound in how many
people have responded,” said Khan, a Harvard-trained lawyer who lives in
Charlottesville, Va.