I added the analysis for second position clitics (from here, 567) to the Matrix and, on my Russian dev choices, what I am seeing is a filler gap rule licensing sentences like (1):
(1) Ivan li idet? Ivan.NOM Q arrives `Is it Ivan that is arriving?'
Sorry about the garbled characters below (not my fault :); this is sentence (1) ):
At first it was surprising (because the rule is called “wh-phrase”) but now I am thinking: this is probably legit, given that the particle is probably there to indicate focus and probably also some dislocation?
Should I just leave the analysis like this (assuming nothing else is broken)?