Speaking at his unveiling, Pulisic said: "I don't want to be looked at as someone who is the youngest to do this or that".
Hazard, the younger brother of Chelsea superstar Eden, has developed into a great player in his own right. "And I had a good feeling about Borussia Dortmund".
Thorgan Hazard has been sold by Borussia Monchengladbach to Borussia Dortmund for €25.5 million ($28.5 million). BVB narrowly missed the title last season.
Club sports director Michael Zorc paid tribute to Brandt as a "professional with a lot of room for development".
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Doggett added House Democrats are "getting closer" to impeachment but "still have a little more work" in their investigations. Nonetheless, he has voted with Trump most of the time and is aligned with the conservative House Freedom Caucus.
"I am grateful for five great years at Borussia Moenchengladbach and the wonderful memories", said Hazard in a statement on Dortmund's website.
Brandt, a 23-time Germany worldwide, has been linked with several clubs across the continent, including some of the "Big Six" in the Premier League, but Die Borussen have fended off competition to land the forward.
Commenting on the move, Dortmund sporting director Michael Zorc said: "We are delighted that Thorgan has chose to go with Borussia Dortmund". I had the chance to play on both at Dortmund but I have experience of playing as a number 10 with the national team as well.
"He has proven his class over the past few years".
He has now arrived at Stamford Bridge after returning to Dortmund on loan.