President Barack Obama took questions on the fiscal cliff via Twitter this afternoon, part of the White House's ongoing public relations campaign to put pressure on Republicans in the debt negotiations.

The Twitter Q&A, which used the White Houses's new "My2K" hashtag, was specifically focused on pushing Congress to pass an extension of the Bush tax cuts for people earning under $250,000. House Republicans have so far resisted the extension, which would raise marginal tax rates on wealthy Americans.

Check out the highlights from the exchange below:

UPDATE, 2:05 p.m.:

Here's the opening tweet:

White House photographer Pete Souza tweets this photo of Obama taking questions:

UPDATE, 2:15 p.m.: And here's another, of Obama's hands:

UPDATE, 2:24 p.m.:

So far, Obama has taken three questions during his live Twitter chat, and responded with standard White House talking points. Here's the exchange so far: '

UPDATE, 2:31 p.m.:

Obama explains why the White House is insisting on letting the Bush tax cuts expire for top earners, rather than just increasing revenue by eliminating deductions for the wealthy:

UPDATE, 2:35 p.m.:

Obama takes a question on why his administration is putting emphasis on revenues, rather than on spending cuts:

UPDATE, 2:55 p.m.:

Obama tweets that there is "room to negotiate" on the White House plan to avoid the fiscal cliff, presented to House Republicans last week: