The Texas legislator expressed his own personal disapproval of the landmark decision in Obergefell v Hodges back in 2015 -- a ruling that made gay marriage legal throughout the entire United States ... and which some worry might be on the chopping block soon.

Watch ... during a recent appearance on 'The Cloakroom' podcast via Verdict+, Cruz says he thinks the High Court overreached in its authority back then, ushering in a new right that isn't explicitly stated in the Constitution -- TC, of course, is a strict constructionist.

While he doesn't go further to say anything but his viewpoint on the matter -- saying that it was the wrong decision -- the Twitter-sphere is, no doubt, up in arms after seeing this.

The theory ... the Supreme Court isn't going to just stop at abortion -- that the Justices might try and overturn a lot of old cases tied to privacy -- including Obergefell, if not more. Of course, in order for that to happen ... a case touching on this must be brought forth, of which there doesn't seem to be any right now on the court docket in the near future.

Still, the fact a case could potentially make its way to SCOTUS is a very real possibility ... and with this current Justice lineup, they might be inclined to undo years of precedent.

Justice Clarence Thomas explicitly said he thought the court had a duty to go back and overturn a number of cases that were in the same legal ballpark as Roe ... and it sounds like Senator Cruz is onboard with that.