A congressman, a senator, and a mystery

The endorsements are coming so fast and furious it's hard to know who's backing whom -- and whether it really matters. Here are a couple that do:

Mitt Romney picked up the support of US Representative Lamar Smith of Texas, an immigration hard-liner who's been in Congress 20 years. "Governor Romney is the only candidate in this race who has the ability to take Washington apart and put it back together, so that it works better for the American people," Smith said in a statement that drew notice on the Elect Romney in 2008 fan site. Smith's statement, a blogger there wrote, could "never be given about any of the leading presidential candidates."

Hillary Clinton's campaign, meanwhile, announced the endorsement of Dianne Feinstein, California's senior senator. "There has been no election for president where change is as defined and necessary as this one," Feinstein said in a statement. "The question is who is best equipped to lead that change. I believe it is Hillary."

Now Barack Obama has set off rampant rumors in New Hampshire about a "major" mystery backer set to be unveiled tomorrow morning in Concord. Lips are sealed at Obama headquarters, but they're acting like it's a big deal. Hopefully we'll know later today whether that's spin or the truth.