Politics returns as Obama adviser tweets about Romney secrecy

Obama campaign adviser David Axelrod.

(CBS News) After a brief respite from election-year partisanship following Friday's mass shooting in Colorado, Obama campaign adviser David Axelrod was back on offense Monday morning, tweeting out a series of articles about Republican presidential candidate Mitt Romney, whom he cast as a secret-keeper of Olympic calendar.

"Tax returns. Bundlers. Bain. MA records & now key docs from Olympics. When it comes to secrecy, Mitt takes the gold!" Axelrod tweeted, linking to a story from ABC News.

In the aftermath of Friday's mass shooting at a movie theater, which killed 12 people and injured 58 others, the Obama campaign said it would be suspending negative ads in Colorado through the rest of the week. The Romney campaign said ads in Colorado are down "until further notice."

Meanwhile, President Obama on Sunday night traveled to Aurora to visit with the victims of the shooting, and Romney, marking a rare occasion of praise for the president, lauded him for the trip.

(Obama speaks in Aurora, Colo., on Sunday.)

It's unclear, however, how long both campaigns plan to rein in attacks on their rivals.

Not long after Axelrod posted his tweets, the Democratic National Committee (DNC) blasted out a CNN story about Romney's "other tax secret." The Obama campaign also has a conference call scheduled for later this morning about Romney's scheduled trip overseas.

Axelrod's Twitter bio states that "Views expressed through this personal account are my own," and the Obama campaign declined to comment on the tweets.