The military put her under house arrest in 1989 following the suppression of pro-democracy protests. The NLD swept a 1990 election by a landslide but the junta ignored the result and kept Aung San Suu Kyi under house arrest for 15 of the next 20 years.
She was released in November 2010, a week after a general election, widely regarded as rigged, swept the USDP to power. The NLD boycotted the election as undemocratic.
The EU and US have lifted or suspended most sanctions against Myanmar, although Washington warned they could be reimposed if it backtracked on reform.
Denying Aung San Suu Kyi a crack at the presidency could suggest to the world that Myanmar is doing just that, McLeod said.