What is John W. McCormack?
{{Infobox officeholder |name = John McCormack |image = Democratic Leaders White House 1965(cropped).jpg |office = 45th [[Speaker of the United States House of Representatives]] |term_start = January 10, 1962 |term_end = January 3, 1971 |predecessor = [[Sam Rayburn]] |successor = [[Carl Albert]] |office1 = Leader of the <br>[[House Democratic Caucus#Caucus Leader|House Democratic Caucus]] |term_start1 = January 10, 1962 |term_end1 = January 3, 1971 |predecessor1 = [[Sam Rayburn]] |successor1 = [[Carl Albert]] |office2 = [[Party leaders of the United States House of Representatives|House Majority Leader]] |deputy2 = Carl Albert |term_start2 = January 3, 1955 |term_end2 = January 10, 1962 |predecessor2 = [[Charles A. Halleck]] |successor2 = Carl Albert |deputy3 = [[Percy Priest]] |term_start3 = January 3, 1949 |term_end3 = January 3, 1953 |predecessor3 = Sam Rayburn |successor3 = [[Charles A. Halleck]] |deputy4 = [[Patrick J. Boland]]<br />[[Robert Ramspeck]]<br />[[John Sparkman]] |term_start4 = September 16, 1940 |term_end4 = January 3, 1947 |predecessor4 = Sam Rayburn |successor4 = Charles A. Halleck |office5 = [[Party leaders of the United States House of Representatives|House Minority Whip]] |leader5 = Sam Rayburn |term_start5 = January 3, 1953 |term_end5 = January 3, 1955 |predecessor5 = [[Leslie C. Arends]] |successor5 = Leslie C. Arends |leader6 = [[Sam Rayburn]] |term_start6 = January 3, 1947 |term_end6 = January 3, 1949 |predecessor6 = Leslie C. Arends |successor6 = Leslie C. Arends |office7 = Member of the<br />[[United States House of Representatives|U.S. House of Representatives]]<br /> from [[Massachusetts]] |term_start7 = November 6, 1928 |term_end7 = January 3, 1971 |predecessor7 = [[James A. Gallivan]] (12th)<br />[[Hastings Keith]] (9th) |successor7 = [[Hastings Keith]] (12th)<br />[[Louise Day Hicks]] (9th) |constituency7 = [[Massachusetts's 12th