Romney in battleground state of Colorado, plus more to watch for Wednesday in politics

— -- It's shaping up to be a low-key, routine day in terms of scheduled events.

Mitt Romney will campaign in Colorado — a battleground state President Barack Obama won in 2008 — and he'll then head to Oklahoma, a safe GOP state.

Romney won all three of Tuesday's presidential primaries in Indiana, North Carolina and West Virginia.

President Obama and Vice President Joe Biden will meet with NATO Secretary-General Anders Fogh Rasmussen at the White House in preparation for the NATO Summit of Heads of State and Government scheduled in Chicago on May 20-21.

The John Edwards trial continues in Greensboro, N.C. Jennifer Palmieri, a former campaign spokeswoman for Edwards and now the deputy communications director for Obama, is expected to testify about a 2007 argument in which Elizabeth Edwards confronted donors about support for her husband's mistress, Rielle Hunter. The prosecution is expected to finish presenting its case on Thursday.

And then there is this: President Obama and first lady Michelle Obama host a concert honoring songwriting team Burt Bacharach and Hal David, and present them with the 4th Library of Congress Gershwin Prize for Popular Song. There also will be performances by Sheryl Crow, Diana Krall, Lyle Lovett and Stevie Wonder.

Sources: Yahoo! News, Associated Press

More popular Yahoo! News stories:

• Romney: Obama is leading the country 'sideways or worse'

• Obama using health care law to court Latinos

• RNC Hispanic outreach director: Romney 'still deciding what his position on immigration is'

Want more of our best political stories? Visit The Ticket or connect with us on Facebook, follow us on Twitter, or add us on Tumblr. Handy with a camera? Join our Election 2012 Flickr group to submit your photos of the campaign in action.