"They really wanted this watch, but as far as they were concerned it was purely sentimental, " White recounts.

FORBES: Magazine Article

"This is purely political, " a White House aide told CNN as the vote was getting underway, arguing that the science behind the issue does not support the arsenic level changes ordered in late January by the outgoing Clinton administration.

CNN: House votes in favor of lower drinking water arsenic levels

But what best mobilizes this White House is a purely political fight, preferably a campaign.

CNN: The White House Adrift

Now, with the arrival of a million white, mainly poor, foreigners, immigration is being analysed in more purely economic terms.

ECONOMIST: Immigration trends