When attempting to call out the sitting President of the United States of America through a medium used by millions of voters, it's important to check your spelling. Especially when you are a presidential candidate. Especially when you're addressing an issue that's supposed to be pretty important to you, a person who no doubt uses a phrase like "the dignity of human life" a lot in debates, interviews, and campaign speeches.
If you don't check your spelling, your tweets could look like this. And that would be embarrassing for someone running for the highest office of what is (supposed to be) the greatest nation in the world.