The law protects the tech giants from being held liable for user posted content.

Trump's threat to veto the National Defense Authorization Act is his latest attack on big tech companies over unproven allegations that they stifle conservative voices.

But congressional aides have expressed doubt that Trump will actually reject the legislation.

The sweeping $740 billion N.

D A.

Decides the annual policy and budget for the Department of Defense.

It's been passed every year for nearly six decades.

One of the few major pieces of legislation seen as a must pass.

It governs everything from pay raises for the troops to aircraft purchases, as well as how to best compete with rivals like Russia and China.

Earlier this year, the Democrat led House and Republican controlled Senate passed different versions of the bill.