Which key member of the white house office is considered to have the most influence over the president?

Which source would best a historian understand the effect of the great chicago fire on families? a. a biography of a chicago family displaced by the fire b. a letter from a grandmother in new york to her family in chicago c. a newspaper editorial about families who were displaced d. an oral history dictated by an adolescent who fled the fire

Who did the first work in creating vaccines

Explain how scientist from the scientific revolution and the catholic church tie together