"Treason against the United States, shall consist only in levying war against them, or in adhering to their enemies, giving them aid and comfort."
This is the part you addressed. Perhaps this could be construed as "giving our enemies aid". The actual legislation adds more details. But the constitution continues:
"No person shall be convicted of treason unless on the testimony of two witnesses to the same overt act, or on confession in open court."
Which, actually, may not be an evidentiary standard that could be met here, assuming Greenwald and Poitras don't testify.
"Treason against the United States, shall consist only in levying war against them, or in adhering to their enemies, giving them aid and comfort."
This is the part you addressed. Perhaps this could be construed as "giving our enemies aid". The actual legislation adds more details. But the constitution continues:
"No person shall be convicted of treason unless on the testimony of two witnesses to the same overt act, or on confession in open court."
Which, actually, may not be an evidentiary standard that could be met here, assuming Greenwald and Poitras don't testify.