Trump's erratic behavior sparks concerns about presidency

Donald Trump, the President of the United States, has been acting in a very strange and unpredictable way lately.

He has been saying and doing things that many people find concerning.

For example, he sent a letter to the prime minister of Norway suggesting that he should be able to take control of Greenland, which doesn't make much sense.

He has also been talking a lot more than usual, saying over a million words in just one year.

Some people are wondering if he is still able to do his job properly.

Europeans who heard him speak recently were very surprised and worried.

It's like when someone you know starts acting differently and you're not sure what's going on.