As thousands protested in Hamburg ahead of the G20 Summit, Senator Bernie Sanders (I-Vt.) took to Twitter late Thursday to encourage U.S. President Donald Trump to focus on a few key issues as he meets with leaders of the world's top economies.

The two-day summit, which kicked off Friday morning, features discussions on trade, climate change, global terrorism, and the refugee crisis, but politicians are also using their weekend together to organize private meetings.

Trump's first meeting with Russian President Vladimir Putin was the source of much attention and speculation on Friday afternoon after already making headlines earlier as a video of their brief handshake spread online. The two men met just 15 minutes after the start of the G20's "Sustainable Growth, Climate, and Energy" working session, which was likely uncomfortable for Trump, as European allies addressed his decision to withdraw from the Paris Climate Agreement. (Trump reportedly attended the first part of the climate meeting.)

While Sanders did not put climate on his proposed agenda, he pressured the president to address global economic inequality, tensions with North Korea, and Russia's alleged meddling with the 2016 presidential election:

As President Trump attends the G20 summit in Hamburg, Germany, this week, there are three items that should be at the top of his agenda. — Bernie Sanders (@SenSanders) July 7, 2017

1) Growing global economic inequality. The G20 has a major role to play in making sure the benefits of growth benefit all humanity. — Bernie Sanders (@SenSanders) July 7, 2017

2) North Korea. Trump should use the G20 to develop a consensus. Real leadership is bringing parties together to de-escalate tensions. SCROLL TO CONTINUE WITH CONTENT Never Miss a Beat. Get our best delivered to your inbox.





— Bernie Sanders (@SenSanders) July 7, 2017