Durantes as sessões da CPMI, os parlamentares sempre trocam farpas.
In Bipartisan Parliamentary Inquiry Commissions (CPIs) both groups always squabble about pretty much everything
. They just can´t reach a common ground, and nobody is willing to make concessions.
In Multipartisan Parliamentary Inquiry Commissions (CPIs) representatives always squabble about pretty much everything/pretty much about every tiny detail.
(except the important ones, ha ha ha, just kidding!)
And other ways...
In the first, just the boldened part would do, though.