Tag donald trumps team said he congratulated tsai ing wen on becoming president of taiwan in january

I think there may be some confusion here.

Taiwan does not have a president named Tsai Ing-wen. Tsai Ing-wen is the current President of the Republic of China (ROC), commonly known as Taiwan, since 2016. She was inaugurated on May 20, 2016.

It's possible that you may be referring to a different event or statement. However, I couldn't find any evidence of Donald Trump's team congratulating Tsai Ing-wen on becoming President of Taiwan in January.

In fact, the United States has a complex relationship with Taiwan, and the Trump administration has maintained the traditional policy of recognizing the People's Republic of China (PRC) as the sole legitimate government of China, while also supporting Taiwan's participation in international organizations under the name "Chinese Taipei".

If you could provide more context or clarify what you're referring to, I'd be happy to help further!