Current DOJ policy is The President of the United States should not be indicted while he/she is in office.
However, there is no law, Constitutional or Statutory, that would prohibit or prevent the indictment of a sitting President.
Answering the question posed requires a rudimentary understanding and appreciation of the difference and distinction between law and policy. The following is a very simple, uncomplicated, and demystified discussion and explanation:
"Laws and policies are very needed in our society as they help in maintaining law and order in the society and help in shaping political and social aspects of the society.
Though policies and laws can be interrelated, they are definitely two terms having different purposes. No nation can go forward without having certain laws and policies.
A policy is that which outlines what a government is going to do and what it can achieve for the society as a whole.
“Policy” also means what a government does not intend to do. It also evolves the principles that are needed for achieving the goal. Policies are only documents and not law, but these policies can lead to new laws.
Laws are set standards, principles, and procedures that must be followed in society. Law is mainly made for implementing justice in the society.
There are various types of laws framed like criminal laws, civil laws, and international laws. While a law is framed for bringing justice to the society, a policy is framed for achieving certain goals.
Laws are for the people, and policies are made in the name of the people.
Policies can be called a set of rules that guide any government or any organization.
Laws are administered through the courts. Laws are enforceable in which the policies comply.
A law is more formal as it is a system of rules and guidelines that are derived for the welfare and equity in society.
A policy is just informal as it is just a statement or a document of what is intended to be done in the future."
Can a sitting President be indicted?
It seems that we may soon get an answer....