tonight, join jimmy and his guests -- leslie jones, emily ratajkowski, musical guest greta van fleet,nd featuring the legendary roots crew. >> questlove: 9-0-3. northeast texas! >> steve: and now, here he is, jimmy fallon! ♪ ♪ ♪ [ cheers and applause ] : thank you very much, everybody. thank you, thank you. welcome, welcome, welcome, welcome, to "the tonight show." you're here. [ cheers and applause ] you made it, thank you. well, someews out of washington, as part of the russia investigation, robert mueller is now reviewing president trump's tweets to see if he obstructed justice. so, the next time you complain about your job, think of the guy who has to read 40,0ts trump tw [ laughter and applause ] speaking of the president, trump travelled to iowa today. he's under so much pre about russia and the michael cohen tapes, he said, "i got to get out of the country. take me to iowa. [ laughter and applause ] i got to g out. i don't want to see anybody." actually, i saw that trump held an event this week where he talked about making trade deals with other countries, which is called recip