Klobuchar and O'Rourke on Saturday said they wanted the impeachment inquiry of President Donald Trump to continue with Klobuchar saying that the president 'messed around' with the country's national security during his Ukraine call.
Klobuchar and O'Rourke were both in Los Angeles attending a SEIU event.
Tom Steyer, who was attending the Blue Jamboree rally in Charleston, South Carolina, said he believed Trump would be impeached.
House Democrats are examining whether there are grounds to impeach Trump based on a whistleblower's complaint that said the president asked Ukrainian President Volodymyr Zelenskiy to help investigate former Vice President and 2020 Democratic frontrunner Joe Biden and his son.
Lawmakers are looking at whether Trump jeopardized national security and the integrity of U.S. elections for personal political gain.
Trump has called the impeachment investigation a "hoax" and accused the media and Democrats of corruption.