"The Obama era overtime rule was intended to take effect last Dec. 1, but it was senselessly blocked by a federal judge."  

It is only 'senselessly' if you oppose the Federal Judge's ruling.

"The Trump administration and the Republican majority used a legislative tactic to block the rule."  It's called the "Congressional Review Act".  Takes a majority of the House and the Senate and the President's signature.  

The 'tactic' is also known as 'passing a law'.

"The Obama administration tried to close that loophole, but their “persuader rule” got tied up in court and team Trump is now trying to repeal the rule outright."  

Those darn Federal Judges ruling on rules just because they are outside the Presidential fiat!

"The Trump administration overtly supports so-called “right-to-work” laws, state laws that disallow unions from requiring membership dues, thus undermining their ability to survive."

If your union is so useless that it takes a law to make members pay your dues...