In large skillet over medium high heat, brown ground beef with taco seasoning until meat is slightly browned and crumbly, about 10 minutes. Add mixture to large slow cooker.
Stir in remaining ingredients. Set slow cooker to low and cook for 4-8 hours.
Alternatively, meat can be browned in electric pressure cooker, remaining ingredients can be added, and chili can be cooked on high pressure for 15 minutes.
Garnish with freshly grated sharp cheddar, sour cream, and crushed tortilla chips.