The answer to the question of why is fairly obvious.
Trumps administration is embroiled in yet another controversy, this time over A.G. Jeff Sessions apparent lies to Congress during his confirmation hearing.
This is Trumps standard response to any criticism of him or his appointees and policies.
Make a wild accusation (no evidence required to back it up), to deflect attention from his own problems.
This particular one was very poorly thought through, as it actually raises more questions about the very issue he's trying to obfuscate.
