The filibuster is expected to go through the night, against fast-tracked nominees by the Trump Administration. Booker’s protest appears to be in response to a recent wave of Republican nominees being fast-tracked through the confirmation process, many of whom are aligned with Trump’s second-term agenda and Elon Musk’s increasingly influential role in federal advisory circles.
It’s useful because it draws attention to then egregious violations of the rule of law by Trump and Elon. It also blocks the Senate from passing anything that would be part of Trump’s agenda.