President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE's top economic adviser said on Sunday responded to Democratic presidential candidates questioning whether the U.S. economy is benefiting all Americans by saying he doesn't "understand what planet they're describing."

"The United State economy is booming," he added.

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While Trump regularly touts the strength of the economy -- low unemployment and a booming stock market -- Democrats running to defeat him in 2020 have frequently pointed, on the debate stage and the campaign trail, to stark income inequality as proof those economic benefits have yet to reach all Americans.

"(The economy) is running at about a 3 percent average since President Trump took office. On this business about the bad distribution, the blue collar workers, the non-supervisory workers, have done the best," Kudlow said. "The unemployment rate is low, we just had the best June stock market, the Dow Jones, in 80 years, that's going to fill out the 401Ks of middle class folks."

.@larry_kudlow talks 2020 Democrats and their comments about the economy during the debates last week #FNS pic.twitter.com/H0MNFYg6bp — FoxNewsSunday (@FoxNewsSunday) June 30, 2019

"Somebody's got to do a little fact checking here on what some of these candidates are saying," Kudlow added. "I would simply say this, the economy is strong, the narrative I'm hearing from the other side, it just ain't so."