Vote for DeSantis, perhaps showing a little negativity? (8)
I believe the answer is:
electron
'desantis perhaps showing a little negativity?' is the definition.
I can't tell whether this definition defines the answer.
'vote for' is the wordplay.
'vote' becomes 'elect'.
'for' becomes 'ron' (I can't explain this - if you can you should believe this answer much more).
'elect'+'ron'='ELECTRON'
Can you help me to learn more?
(Other definitions for electron that I've seen before include "There's not much to it" , "Small matter" , "Elementary particle with negative charge" , "One charged" , "Particle found in all atoms" .)