An appositive is a noun or noun phrase that directly follows another noun or a pronoun and renames that noun or pronoun. A pronoun used as an appositive has the same function (usually subject or object) as the word(s) it renames.
The appositive Dr. Bell and I renames the subject, strategists. Test: I could not agree (not me could not agree).
The appositive the bicyclist and me renames the direct object witnesses. Test: interviewed me (not interviewed I).
Exercise: Pronoun case (such as I vs. me) 1
Exercise: Pronoun case (such as I vs. me) 2
Exercise: Pronoun case (such as I vs. me) 3
Exercise: Pronoun case: review 1
Exercise: Pronoun case: review 2