TX absolutely does have standing and standing to sue PA, WI, MI and any other state that violated Constitutional laws. There is case law to support such.
There have been a couple of recent cases, dealing with interstate commerce, where the courts have ruled that internal restrictions by individual states are unconstitutional if they interfere with the right of citizens of other states to engage in interstate commerce. National issues, protected by the US Constitution override any state’s rights issue.
I hate to keep repeating this, but we are dealing with a national election for national office. And, we have significant evidence to strongly suggest that illegal activities, by state agents in six political subdivisions of five states, resulted in one candidate being illegally denied election to the office in question. To allow the current results, from these jurisdictions to stand, without confirmation, illegally disenfranchises the entire electorate in this country. That is the issue. Essentially, these locales accomplish exactly what the Electoral College was designed to eliminate, domination of the election for President by a few states.
I’m glad that you brought up CORONA virus actions by individual states. In the US, citizens have the right of unrestricted travel from one state to another, especially in pursuit of interstate commerce. So, it seems that denying a person to travel into or through a state because they do not have a current negative test for the virus would raise a huge red flag. What would happen if all surrounding states denied interstate truckers the ability to exit NY until they had completed a 14 day quarantine period? How many truckers would enter NY to deliver food and goods? And what would this do to regional interstate commerce? Citizens of this nation have certain rights which are guaranteed across individual state lines by the Constitution. There was a very good reason for that.