Story highlights Sanders has started writing a speech explaining his political views, but aides have said it has been difficult to get him to agree to give it

Lately, Sanders has suggested there are aspects of socialism already present in American society

(CNN) Bernie Sanders' top strategists and advisers told CNN last month that their candidate had finally agreed to give a major speech explaining his democratic socialist views and that he would do so before the second Democratic debate on November 14.

That plan has now changed.

Tad Devine, Sanders' top strategist, told CNN on Wednesday that the speech will now come after the debate in Des Moines, citing the senator's busy schedule.

But while Sanders has started writing the speech, aides have said it has been difficult to get him to agree to give it.

Devine maintained Wednesday that the senator is "not the least bit apprehensive" to give the speech.

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