Story highlights The candidates sparred at the Nevada Democrats "Battle Born/Battleground" First in the West Caucus Dinner.

The political primaries start next month

Las Vegas (CNN) Hillary Clinton and Bernie Sanders have been circling each other on electability for days, knocking one another from afar over which candidate stands a better chance to beat Republicans in November's general.

On Wednesday night in Las Vegas, they made their cases with the other candidate mere feet away.

"I am proud to be running in a Democratic primary with my opponents. They have a lot of good ideas and we share a lot of the same values," Clinton said with Sanders sitting at a dinner table nearby. "But your choice in the caucus really matters. On February 20th you will begin the process of choosing a president who has what it takes to stand up to the Republicans, to make a real difference for American families."

She then added, digging her critique a little deeper, "A president who can get the job done and not just on a few issue, but on all the complex challenges we face."

The comment was not taken kindly by Sanders supporters, many of whom booed the former secretary of state at points during her speech.

Read More