Mike Johnson doubles down on immigration policy demands in exchange for military assistance – as it happened

This live blog is now closed. For our latest on Republicans' demands on immigration policy, you can read our latest story

• House Republicans to seek to impeach US homeland security secretary

As successive presidents and congresses have learned, it is extremely difficult to find consensus in Washington DC on immigration policy.

Proposals made and deals mulled during George W Bush, Barack Obama and Donald Trump's presidencies have all failed to pass, and there's no telling if the bipartisan negotiations currently happening in the Senate will produce a compromise that can make it through both chambers and win Joe Biden's approval.