You seem to have the impression that SCOTUS is the POTUS's boss. They're not; they're co-equal branches of the government. Or, maybe you don't get that they're saying "no" to something specific, how something is being done - as in it was being done without an EO & now he's apparently going to issue an EO, and the SCOTUS might say "oh, ok; that's fine to do it that way - with an EO." If a case is brought afterwards to fight the EO, and the SCOTUS rules that the EO is unconstitutional, and Trump still continues with putting the question on the census, then and only then would Trump be crossing the line and subjecting himself to legitimately being impeached.Seriously, when is congress going to get serious and start impeachment? It’s way past time. The Supreme Court said no! No means no. But I guess Trump doesn’t know what “no” means, just ask some of his female victims.
If the Democrat majority House votes to impeach Trump for a political motive or agenda, then the Republican majority Senate will probably simply respond in kind by voting not to convict Trump.