https://motherboard.vice.com/en_us/article/ne45jd/rand-paul-filibuster-fisa-702-senate

On Tuesday afternoon, a bipartisan coalition of 3 Democrats and 2 Republicans committed to filibustering the FISA Amendments Reauthorization Act of 2017, a bill that effectively expands the warrantless surveillance of American citizens. Last week, the House of Representatives voted in favor of a nearly identical bill to the one being considered in the Senate today.

The filibuster coalition is led by Republican Senator Rand Paul and Democratic Senator Ron Wyden, who have co-sponsored the USA Rights Act, a privacy-oriented alternative to the FISA Amendments Reauthorization Act that is widely supported by civil rights groups.