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Upon Wadsworth's arrival in D.C., he immediately began caucusing with Radical legislators as if he were himself a legislator. He appears to have been used by Edwin Stanton against McClellan in the Spring of 1862 in the "defense of Washington" fiasco, but this is to underestimate the political power of Wadsworth at that time.
Wadsworth squandered his political capital in the fall of 1862 when he overturned the Weed-Seward plot to run Democrat John Dix for governor on the fusion "Union Party" line in New York. Running as a full-blooded radical Republican, General Wadsworth lost the election to Democrat Horatio Seymour. By mid-war, Wadsworth reverted to being just another political general. Later in the war, Charles Wainwright could look at the errors Wadsworth was making and regard him as a bungler. In his Diary of Battle, he did admire Wadsworth's personal qualities.
Killed in 1864, Wadsworth died the richest general in the Army (by legend). He was a patroon, like the Delanos, and oddly enough the Wadsworths and Delanos were McClellan's next door neighbors in what is now E. Orange, New Jersey.
I'm not sure which Wadsworths lived so amicably next door to GBM, but General James did leave behind a son, and a grandson more on whom later.