Romney slammed in Spanish-language ad

The Service Employees International Union and a pro-Obama political committee are following Mitt Romney from Florida to Nevada, launching a radio ad in the Silver State accusing the Republican of being  "dos caras" -- two-faced -- in his messages to Latino voters.

The labor group and Priorities USA Action said they were beginning today with a 30-second ad on Spanish stations in Las Vegas and Reno. What the groups said was a six-figure ad buy for a week-long campaign also covers running the ad in Florida markets as well.

Eliseo Medina, SEIU secretary-treasurer, charged Romney finessed an anti-immigration stance in order to win votes in Florida, a different message from what he told voters in South Carolina earlier in the month.

"As he heads West, it's anyone's guess which Mitt is going to show up," Medina said.

The radio ad in Spanish can be heard here.

The transcript can be read here in Spanish and English.

There was no immediate comment from the Romney campaign in Nevada. When the SEIU ran a similar ad in Florida last week,  campaign strategist Stuart Stevens called it "completely false."