"Again" as in, "like before" (when he gained simultaneous possession.) The only way that changes anything is if we argue a player must have both hands on the ball to have possession, obviously absurd in light of all the one handed catches we have seen over the years (I saw several last weekend alone.) That leaves us with "There is no such thing as a player having more control than the other based on having it near his chest," and likewise no such thing as a player having more control than the other based on having it in both hands rather than one. So the only thing established "again" was Tates second hand on the ball: Removing one hand while his other was still grasping it did not end possession.

Of course, even if it did there would still be the issue of whether Jennings was down in the endzone before Tate stripped him. Another of the many ways NFL rules favor the offense: If Jennings catches the ball in the endzone, then Tate takes it away, it is a TD unless Jennings first stepped out of the endzone, took a knee, or something similar to end the play. He could (and defensive backs often do, silly creatures that they are ) try to run the Int back, because the ball is still live, and as long as it IS alive Tate can take it away from him. However, if Tate manages to do that in the endzone, or if he comes down with it initially, it is a TD: A play ends the moment a player breaks the plane of their opponents goalline with the ball.