:::Summary/Quick Answer:::
A: It means he is relying on drugs of some sort and / or there is a conspiracy by which the power is "owned" by other politicians but they give him support in the background.
Because he is NOT a Politician or in Royal Circles (see here) - they are just supporting him due to their own beliefs about him and his ability to save or perfect the country in which he represents.
In Daniel 8:24 it talks about the AntiChrist/False Prophet as having power or strength that is "not his own". One could say that is a political reference; that people prop him up - that is certainly a possibility but given the generic description and referring to him next "succeeding in whatever he does" and this coupled with Thessalonians "his coming will be with the working of Satan" and given my earlier article on his personality (with references) - I believe this is referring to drug use.
It could also be that this person is "hailed in" though and everyone expects him and sees him as a Savior so they give him support in the background.
"Power" and "Strong" almost certainly refer to political power / prestige.
