Twitter (on phones at least) does not allow highlight and copy.
Then hit “embed”, takes you to another page, hit “copyu”, and paste here.
I did that c & p on my phone.
How to embed a Tweet on your website or blog
1. Click the down arrow icon located within the Tweet.
2. From the menu, select Embed Tweet.
3. This will open publish.twitter.com where you can customize the look of the embedded Tweet by clicking set customization options.
4. If the Tweet is a reply to another Tweet, you can check Hide Conversation to hide the original Tweet.
5. Once you like the look of the embedded Tweet, copy the code provided by clicking the Copy Code button.
6. Paste the code into your blog or website.
https://help.twitter.com/en/using-twitter/how-to-embed-a-tweet