Shutdowns are a repeat feature of US politics - but this one feels particularly bitter due to political dynamics and bad blood between the two parties.
Some government services are temporarily suspended, and about 750,000 people are expected to be put on unpaid leave as Republicans and Democrats can't agree a way forward on a spending bill.
Votes aimed at ending the impasse have repeatedly failed, and it is hard to see an off-ramp this time because both parties - as well as President Donald Trump - can see some merit in digging in.
These are the four ways in which things feel different in 2025.
[SRC] https://www.bbc.co.uk/news/articles/cwydzenj6epo
