Yesterday I did not check my Junk folder, so I missed the other message that I received from Our Revolution. The message contains some the information found in this document, listing state and regional OR endorsements for various races, including Congressional contests in which Gulf Coast residents might vote. Be advised that the hyperlink at the top of each page directs you to a Google documents page containing the candidates' statements.
In addition to the lack of an endorsement for US Senate, the document mentions no endorsements for any statewide races. I presume they're holding off on that until after the primaries, but why? If I find out, I'll post something about it here.
Also, since Lina Hidalgo is unopposed for the Democratic nomination for Harris County Judge, they have opted to wait on that race as well.