1) Why is trump’s massive $1 billion dollars of debt to undisclosed foreign creditors, much of which is coming due within the next four years, a national security risk to the United States? https://www.defenseone.com/ideas/2020/10/why-donald-trumps-debt-national-security-risk/169330/

2) “It is all about leverage. Security agencies want to be sure that there is nothing in your past that someone could use to pressure you to betray America....”

3) For example ~

If the president owes a foreign creditor “a lot of money, they have leverage over you. If I owed someone, say, $420,000, it would raise serious questions about whether that” creditor, or the nation or foreign individual, backing that creditor...

4) ... “could pressure [the president] into disclosing classified information...”, or make deals on behalf of the United States that benefit that other person or nation, and NOT the US.