(CNN) President Donald Trump has begun the initial steps of preparing for a possible interview with the special counsel, a White House official and a person familiar with the situation said Friday, a sign the President's legal team is intensifying its deliberations over whether to allow him to come under Robert Mueller's questioning.

One source familiar with the proceedings stressed the preparation efforts is "in its infancy."

The preparations have been short and informal and included going over potential topics with the President that Mueller would likely raise in an interview, the people said.

The President has not formally agreed to sit for an interview with Mueller.

But word of early preparations is the clearest sign yet that Trump and his team remain open to an interview with Mueller, despite concerns from some people close to the President that such an interview could expose him to possible charges of perjury.

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