WATCH: Trump Crowd Boos Paul Ryan

Trump in Wisconsin

Donald Trump said Tuesday that he's fully mended fences with Speaker Paul Ryan, praising him as being "like a fine wine" — in that he improves with time — after Ryan thanked him for helping states like Pennsylvania, Michigan and Wisconsin "see the light of day" and put a Republican in the White House.

"He has been, I'll tell you, he has been terrific. And you know, honestly, he's like a fine wine. Every day goes by, I get to appreciate his genius more and more," Trump said of Ryan at a rally in the suburbs of Milwaukee.

But by the smattering of boos throughout the crowd when Ryan spoke — and when Trump praised the Speaker — it was clear for many in Wisconsin the wounds of the election season haven't healed yet.