I'm pretty sure the levels should be the same in the two chambers, so, as I said previously, it is likely that the connection between them is blocked.
I think that it will be necessary to empty the fosse to access this.
On some great and glorious day the plain folks of the land will reach their heart's desire at last, and the White House will be adorned by a downright moron.
H. L. Mencken 1880 - 1956
Some may not like his views, but what a prediction!