P then an A = 'Half' of PAIN!
h/t @Bruno062418

(P=16) + (A=1) = (Q=17)

UPDATED: POTUS gives us the next letter in PAIN
'if' was corrected to 'of'
Now we just need a 'N'!

UPDATED: POTUS has now given us the final letter in PAIN
It's coming.

h/t @K155MYA55 @Bruno062418

DO YOU BELIEVE IN COINCIDENCE?

For the record, this is not just a cobbled together random series of 'typos'.
After Trumps 'Invoke P' tweet the next 3 'typos' he made were the A, the I, and the N.

Well there you have it, I believe Trump just confirmed this decode.
https://twitter.com/realDonaldTrump/status/1245876816922972162
Moments after posting the decode Trump, I believe, gives the hat tip!