Why would you think that? Congress can determine whatever means it likes for establishing naturalization criteria and, certainly, illegal entry is a legitimate barrier the courts, including SCOTUS, should recognize.
Under Newt's expressed concept, red card holders can only apply for citizenship if they leave the country and apply from back home.
Anybody who can't see that as clearly as the noonday sun on a cloudless day in June at the equator, I have a very good deal on a selection of New York bridges and tunnels.
PS: what Newt says now as part of his sales pitch means ZERO. What counts is what will be argued in front of the SCOTUS, and in a billion years they will NEVER permit a “two-tier citizenship” to stand.
Again: noonday sun, bridges for sale in NYC.