But activists are angry about President Barack Obama hosting Thein Sein, and lawmakers are wary. The Myanmar leader has led the shift from decades of direct military rule, but has stalled on some reform commitments and failed to stop bloody outbursts of ethnic violence.
Thein Sein previously served in a repressive junta, and his meetings at the White House and Congress would have been all-but-impossible before he took the helm of a nominally civilian government in 2011. His name was only deleted from a blacklist barring travel to the U.S. Last September.
Myanmar has been rewarded by relaxation of tough economic sanctions, and Thein Sein will be addressing U.S. Businessmen keen to capitalize on the opening of one of Asia's few untapped markets.
"President Thein Sein's visit underscores President Obama's commitment to supporting and assisting those governments that make the important decision to embrace reform," the White House said in its announcement of Monday's visit.
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The U.S. Last month announced it is considering duty-free access for Myanmar to U.S. Markets, and there could be progress Monday toward a bilateral trade and investment framework agreement.
The most significant outcome of Thein Sein's trip could be a symbolic one. Obama is expected to use "Myanmar" - the country name adopted by the junta in 1989 - when he meets Thein Sein. However, the U.S. Will keep using "Burma" in official documents.