Dr. Craig is a liar.

[Jehanne]

Stephen Hawking's "no boundary" proposal:

https://en.wikipedia.org/wiki/Hartle%E2%...king_state

The Hartle-Hawkings model does not answer the question of explanation. It is just another theory with a boundary.

The Universe would just BE.  Read the first paragraph from the article:

Hartle and Hawking suggest that if we could travel backward in time toward the beginning of the universe, we would note that quite near what might have otherwise been the beginning, time gives way to space such that at first there is only space and no time. Beginnings are entities that have to do with time; because time did not exist before the Big Bang, the concept of a beginning of the universe is meaningless. According to the Hartle–Hawking proposal, the universe has no origin as we would understand it: the universe was a singularity in both space and time, pre-Big Bang. Thus, the Hartle–Hawking state universe has no beginning, but it is not the steady state universe of Hoyle; it simply has no initial boundaries in time nor space.[1]

In this sense, the Universe is its own cause because even though it is finite, it had no beginning.  Therefore, the Universe is a "necessary entity" with no need for its explanation; even though it is finite, it has always existed.