Sources within the headquarters of the USDP – which is effectively a political extension of the military – said Shwe Mann, party chairman and Speaker of the parliament, had been deposed and was under police guard. His closeness to opposition leader and democracy figurehead Aung San Suu Kyi is believed to have soured his relationship with military leaders in Burma, also known as Myanmar.http://www.theguardian.com/world/2015/aug/13/burmese-forces-surround-ruling-party-headquarters-and-confine-mps-report
Christian Lewis, a political risk analyst for Eurasia Group, said a faction in the party loyal to Thein Sein appeared to have finally moved decisively against Shwe Mann after a long-running power struggle.
“In terms of the election, these events strongly support the idea that Thein Sein will seek a second term for president,” he said.
Guess the idea of the "reformist" Thein Sein is finally dead. The Tatmadaw never changes.