The lectures were subsequently collected into a related series of publications, providing a valuable record and extending the debate on contemporary artistic practice and theory. (artbook.com)
This is very savvy - extending the debate so it appears he is trying to reform all of British politics. (politics.co.uk)
The most common form of filibuster occurs when a senator attempts to delay or block a vote on a bill by extending debate on the measure. (politics.stackexchange.com)