This is a pro-union, pro-workers rights, and wage equality activist shirt. It is Democratic, liberal, progressive, a little socialist, and anarchist, which makes it anti-Trump, anti-Republican, anti-conservative, and anti-right. It is perfect to wear at all rallies, marches, protests, and demonstrations. And Strikes. This shirt is ideal to wear at a strike.
The IWW was an important industrial union and was the first American labor union to recruit and organize women and people of color, playing a critical role in the fight for the eight-hour day and in free speech fights all over the country in the early 20th century. -Wikipedia
The Black Cat is closely associated with anarchism, especially with anarcho-syndicalism. -Wikipedia
Aggrovist Apparel makes shirts for Resist, Equality, and Activist causes.