statesman

n. man who is experienced in administering government affairs, man who is a wise and experienced political leader

A statesman or stateswoman is usually a politician or other notable figure of state who has had a long and respected career in politics at national and international level. As a term of respect, it is usually left to supporters or commentators to use the term.When a politician retires, he is often referred to as an elder statesman by his supporters.
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Noun
1. a man who is a respected leader in national or international affairs
(synonym) solon, national leader
(hypernym) politician, politico, pol, political leader
(hyponym) elder statesman

(n.)
One occupied with the affairs of government, and influental in shaping its policy.
  

(n.)
A small landholder.
  

(n.)
A man versed in public affairs and in the principles and art of government; especially, one eminent for political abilities.
  

Synonyms and related words:
Admirable Crichton, adept, artisan, artist, attache, authority, connaisseur, connoisseur, consultant, cordon bleu, crack shot, craftsman, dead shot, diplomat, diplomatist, elder statesman, experienced hand, expert, expert consultant, graduate, handy man, journeyman, marksman, national leader, no slouch, politician, pro, professional, professor, proficient, public man, savant, shark, sharp, solon, stateswoman, technical adviser, technician