Donald Trump’s “Made in USA” Bitcoin pledge is hitting the hard wall of blockchain reality. Back in June, the ‘crypto president’ posted on Truth Social that he wanted all remaining Bitcoin to be mined in the United States.

As Donald Trump prepares to fulfill a lengthy list of campaign promises, the president-elect’s vow to ensure that all remaining Bitcoin is “made in the USA” may prove to be one of the most challenging to keep.

Bitcoin is made through a process known as mining, in which operations use high-powered, fuel hungry computers to solve complicated math problems used to validate transactions in the network and post them to a public ledger,