scrape congressional debate transcripts?

[eccuraa]

Would be very helpful to collect and store all congressional debates in one place.
Would be even better to produce summaries of pro & con arguments, like the Dutch government does.

[DanielSchuman]

If you mean all debates on the floor in the House and Senate, they're published in the Congressional Record. That's available online and is also accessible through the Congress.gov API.

If you mean the debates in committees, they're published as part of the serial set. As far as I know, they're not published as structured data, but more recent elements (such as transcripts of committee proceedings) are available at HTML/XML and older versions are available as PDF. See, for example, here.

Is there something that you're looking for in particular?