You can select sat Texas, double click into it to get to Edit mode.
Now copy its shape. ( cmd + C )
Now add the rect and do the show Button controls as I detail in the above answer.
Then convert the rect to a vector shape.
With the Rect in edit mode. Paste the Texas shape you copied earlier onto it.The rect will take its shape.
You now have a Texas vector shape that you can use Button controls.
This way saves you re drawing all the shape manually.