Why is this Article entitled 'Chuck Schumer' instead of Charles Schumer?

Why is this article entitled by a personalized campaign name? "Chuck" was always known as Charles for most of his political career until his handlers decided to personalize it. Why is an encyclopedia using a nickname for a significant person? Do we title the article on Albert Einstein, Albie Einstein? What smallbrain contributors have restyled Wikipedia to be a campaign launch pad for politicians reelection campaigns. This is not the only politician in Wikipedia that has been rewritten and designed by the politician's employees. There is no reason for Wikipedia to lower its already low standards to accommodate campaign strategies, is there?