President Donald Trump. Carlos Barria/Reuters President Donald Trump tweeted late Tuesday night that he would veto the National Defense Authorization Act unless it included a repeal of Section 230. Section 230 is the part of US law that grants broad protections allowing tech companies to moderate their own platforms. Trump has been trying to roll it back since Twitter first applied fact-checks to his tweets in May. The NDAA is an annual defense-spending bill worth roughly $740 billion, and Trump has already threatened to veto it if lawmakers go ahead with a plan to rename Army bases named after Confederate generals. Visit Business Insider's homepage for more stories. President Donald Trump is trying desperately to revoke a part of US law that protects Big Tech companies.The president tweeted late Tuesday night that he would veto the National Defense Authorization Act unless it included a repeal the statute known as Section 230."If the very dangerous & unfair Section 230 is not completely terminated as part of the National Defense Authorization Act (NDAA), I will be forced to unequivocally VETO the Bill when sent to the very beautiful Resolute desk," Trump tweeted.—Donald J.