CNN explains Why the Government Shutdown Might Last Longer Than You Think.
CNN's reason is "human nature".
CNN then came to a brilliant conclusion: "The most likely scenario remains a relatively brief government shutdown."
In summary, human nature may cause the shutdown to last longer than you think, but most likely it won't. Thank you CNN.
Trump threatened the "Nuclear Option". That means Trump proposes the Senate change the rules so that only 51% are needed to end a filibuster instead of 60%.
That possibility ensures blockage will not go on indefinitely. At some point, Republicans would do just that.