If you want to know what really happened read here. If you just want to roll around in liberal outrage, move on.
The current law was renewed in 2015 and is set to expire in 2020, but the fund's administrator announced in February that there was insufficient funding to pay all claims. At the time of its last renewal, Congress appropriated $4.6 billion for the fund, bringing the total appropriated amount of the fund over the years to $7.4 billion. The new bill, which advanced out of committee last week, does not call for a specific amount of money but whatever sums necessary through 2090.
They basically wanted a blank check. Rand Paul and Mike Lee specifically blocked/objected to it.
Rand Paul will block anything with an unspecified funding amount.
This is just bullshit posturing by Democrats and Reddit liberals not understanding anything.