The president is over the Executive branch and is the Commander in Chief of the military.
When Congress allocates funds, it does not micromanage how these funds are spent because the implementation is part of execution rather than legislation. Legislation defines parameters, but ultimately those doing the job must do the job, and this includes spending the monies allocated.
The wall is legal. Laws already are on the books.
Using resources designated for drug enforcement and protecting the borders are specifically border security matters under the operational control of DEA and military which are part of the executive branch.
This specific matter is where the president has the GREATEST authority. It is his job to defend our nation from foreign and DOMESTIC enemies. This trumps (yes, intentional) EVERYTHING else. Without this executive power we cannot have a nation. If everything else in government fails, we MUST have an executive who can do whatever it takes to protect the nation.
This president has had to deal with a concerted effort by the Deep State and Uniparty to steal the executive office in a coup. He has had to deal with an abuse of the right to a free press which has been taken over by rich and powerful political interests to subvert our Republican form of government and freedom of religion. He has had to deal with the illegal and criminal efforts to import MILLIONS of illegal voters to steal this nation from its rightful owners.
If this president is unable to do the job the PEOPLE elected him for, the only option left is WAR.
Great post!