"repeats his mantra, no matter, what"
"he has his mantra", "ask him anything, he just repeats his mantra"....
Sokféleképpen meg lehet fogalmazni.

A mantra szót (az eredeti értelme mellett) használják arra az esetre, amikor valaki gyakran ismétel egy - általa jónak vélt gondolatot tartalmazó - vagy betanult szólást, szöveget, akár a témától függetlenül is.

He was a dull interview because his answers were the same, no matter what question you asked. He talked about hard work and defense. He just never answered the question, instead repeating his mantra of hard work and discipline.
hometownargus.com/content/view/912/29/

McCain kept repeating his mantra, “the fundamentals of the economy are strong.” mccainkeatingfive.com/?p=29

President Elect OBAMA's mantra was "its time for change".
answers.yahoo.com/question/index?qid=20090115011902AAHwefL
Taking on Obama's mantra of "change,"
The Barack Obama mantra, "not too high; not too low"...
The Obama Mantra "Here you can see what the great depression was. But what we have now is a major credit crunch, not a great depression. ...
(Már kb 2 milliószor emlegetik Obamát a mantráival!)

Brown concludes by repeating his "do-nothing party" mantra at Cameron.
Brown repeats his mantra that the recession is global and claims that no government is copying Tory policy to counter the recession.
conservativehome.blogs.com/torydiary/2009/01/live-blog-of-pm.html
The Lib Dem leader was repeating his mantra at every stump speech, but by now he (almost) meant it.
www.guardian.co.uk/politics/2001/jun/08/uk.election20016