The donation Donald Trump made to veterans’ charities is small compared with those of some fellow billionaires. Then again, veterans charities don’t appear to be a big cause for billionaires.

At a fiery news conference on Tuesday, Mr. Trump said he had made good on a January promise to raise millions of dollars for veterans groups. He produced a photocopy of a check to show that he had personally given $1 million and said he had helped raise $4.6 million more. “Instead of being like, ‘Thank you very much, Mr. Trump’ or ‘Trump did a good job,’ everyone’s saying, ‘Who got it, who got it, who got it?’ ” Mr. Trump said.