Sen. Bernie Sanders (I-Vt.), a former Democratic presidential hopeful, brought the real talk on Twitter during the first presidential debate.

Sanders tweeted about the importance of the debate early Monday evening:

What we have to do is focus on the issues, not see tonight as an entertainment show. #debatetonight — Bernie Sanders (@BernieSanders) September 26, 2016

He also shared his expectations for Republican nominee Donald Trump:

I hope Trump tells us tonight why, amidst huge inequality, he thinks we should give huge tax breaks to billionaires. #DebateWithBernie — Bernie Sanders (@BernieSanders) September 27, 2016

I hope Trump tells us tonight why despite all the scientific evidence he thinks climate change is a "hoax.” #DebateWithBernie — Bernie Sanders (@BernieSanders) September 27, 2016

I hope Trump tells us what happens to the 20 million he would throw off health insurance. How many will die or become much sicker? #debates — Bernie Sanders (@BernieSanders) September 27, 2016

Sanders called out Trump for his hypocrisy on manufacturing jobs abroad:

Glad Trump is concerned about manufacturing jobs going abroad. He might want to start making his clothing in the US not low-wage countries. — Bernie Sanders (@BernieSanders) September 27, 2016

If Trump is concerned about companies going abroad maybe he should move his plants out of Bangladesh where workers are paid 30 cents an hour — Bernie Sanders (@BernieSanders) September 27, 2016

Sanders also called out Trump’s past claims on climate change, which Trump denied ever making:

Donald Trump thinks climate change is a hoax created by the Chinese. Unbelievable. #DebateWithBernie https://t.co/XPHniyUdY6 — Bernie Sanders (@BernieSanders) September 27, 2016

And that was just in the first 20 minutes of the debate.

Sanders hasn’t been shy about slamming Trump before, calling out his “bigotry.” Sanders endorsed Democratic nominee Hillary Clinton in July after a long primary battle.

Sanders will campaign with Clinton in New Hampshire on Wednesday.

Read more debate commentary from Sanders on his Twitter feed.