Even if the conversations were perfectly legal, as the White House claims, the situation challenges President Obama's efforts to present himself as a reformer who will fix a town of dirty politics.
Despite comprehensive measures to improve the situation, challenges to implementation remain (13– 13).
But nothing in this situation challenges the value of SeaWorld's public exhibition of wild animals for conservation awareness.
This situation challenged the ability of the NGOs to raise funds for their own tree-planting programs and to maintain their own individual identities, as they became subsumed into the city MTLA initiative.
This situation challenges the current knowledge of stroke pathophysiological events as well as the relevance of experimental models.
The situation has challenged the church's co-pastor, the Rev. Seth Kaper-Dale, to weigh the law against his moral and religious beliefs.
On Monday, Bianchi's family said the 25-year-old had faced "a number of medical challenges" since the accident and the situation remained "challenging".
But recent cuts to environmental budgets make the situation more challenging.
Massimo Mondazzi, Eni's chief financial officer, told analysts that Libyan production was now back to normal though "the situation remains challenging".
The situation is challenging since the trained network architecture has to model a clustered data set where relationships among the data clearly deviate from the ideal linear situation.
