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After several deadlocked ballots at the Democratic National Convention and a rousing speech from Santos  President  Bartlet threw his support to Santos as did a key teachers ' union leader which secured the nomination for  Santos  with former White House Chief of Staff Leo McGarry as his running mate .
 None
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:   
Answer:
 NA: President, Santos