Article II, Section 3
"He shall from time to time give to the Congress information of the state of the union, and recommend to their consideration such measures as he shall judge necessary and expedient."
First, it's not only allowed that the president would give his views on the 3rd branch's ruling, it is a constitutional requirement, if he feels it needs consideration by Congress...
-Excellent letter to Glenn Greenwald, response to his excellent entry today.
More context here.