Trump campaign manager Corey Lewandowski told the newspaper that some of Trump's wealthy acquaintances backed out and ended up giving nothing for the groups.

Lewandowski said Trump has followed through on his pledge to give $1 million, though the aide said he didn't know if that was included as part of the $4.5 million figure.

At least $3.1 million has been donated to veterans' groups, according to reporting by the Post.