"He injects a lot of excitement, but I also think he has a huge bar to meet - the expectations for him are so high that it's going to be tough not to disappoint some people who are now seeing him through rose-colored glasses", said Democratic strategist Maria Cardona, who worked on presidential campaigns for Hillary Clinton and Barack Obama.
The 46-year-old O'Rourke, a former three-term USA congressman and a punk rocker in his youth, pledged to tackle "the interconnected crises in our economy, our democracy and our climate".
O'Rourke ran for a Senate seat representing the state of Texas in 2018, losing by less than three percentage points to Sen.
Beto O'Rourke announced he is running for president, making it official with an online video released Thursday morning. Both rallies drew thousands, and put the two men's divergent positions on the border wall on sharp display.
Beyond a previously announced event in Waterloo, Iowa, on Saturday, O'Rourke is expected to visit other towns in eastern Iowa, traditionally a Democratic stronghold.
Klobuchar was not the only 2020 candidate to welcome O'Rourke on Thursday.
O'Rourke has been discussed as a potential candidate ever since his unexpectedly tight race against Senator Ted Cruz, when his grassroots campaign of inclusion and getting people politically involved gained national attention.
O'Rourke revealed during the interview for the April issue that he wanted to run for president, adding that he is "just born to be in it". Seven years later, he ran against the incumbent Democratic congressman, Silvestre Reyes, and won, a notable feat in a Latino-majority district.
O'Rourke, a 46-year-old former three-term U.S. representative from West Texas, made the announcement online.
And as a congressman, O'Rourke supported a $2 billion military funding increase that benefited a company controlled by another major donor- real estate developer Woody Hunt, who also co-founded and funds an El Paso nonprofit organization that has employed O'Rourke's wife since 2016. the news outlet reported.
O'Rourke and his campaign helped Democrats almost sweep races in Houston in 2018.