“Let's try this: After I speak here in Iowa about clean energy jobs,” Obama tweeted. “I'll answer a few questions on #CongressToDoList. Ask w/ #WHChat-bo.”

The president has campaigned with a to-do list of things he believes Congress can accomplish before the 2012 election.

Ethan Klapper, the social media editor for The Huffington Post, tweeted this observation:

“By announcing this #WHChat at the last minute, the WH is preventing GOP from working on messaging to hijack the hashtag (as they often do).”