Soak the corn husks in warm water for about 30 minutes to make them pliable.
In a large mixing bowl, beat the vegetable shortening with a hand mixer until fluffy.
Gradually add masa harina, baking powder, and salt, mixing well before slowly adding chicken broth until the dough is spreadable.
In another bowl, combine the shredded pork, red chili sauce, cumin, garlic powder, and salt to make the filling. Adjust seasoning to taste.
Remove a corn husk from the water, shake off excess water, and lay it flat with the pointed end facing away.
Spread about ΒΌ cup of masa dough onto the bottom two-thirds of the husk, leaving space at the edges.
Add 2 tablespoons of the pork filling on top of the masa.
Fold the sides of the husk over the masa and filling, then fold the bottom of the husk up to close it.
Repeat the process with the remaining husks, masa, and filling.
In a large steamer pot, place the tamales upright. Add water to the pot, ensuring it doesn't touch the tamales, cover and steam over medium heat for about 90 minutes.
Allow the tamales to cool slightly before serving.