The phrase "America, love it or leave it" has a pedigree dating back at least to the McCarthy era. In the 1970s, the phrase was employed again against those protesting America's involvement in the Vietnam War. The left has its own version, vowing to leave the country if a Republican is elected president. They rarely do.

President Trump resurrected the phrase by publicly slamming four freshmen congresswomen for their criticism of the United States and his policies. He suggested they "go back where you came from," though they are all American citizens.

Whatever one thinks of the president's remarks, the predictable "racist" charge was leveled at him because the four are women of color and two are Muslim. The president is setting Democrats up for what could be a major defeat in the 2020 election by forcing them to embrace (probably) these people and their statements, thus causing further fallout within the party, or denounce them (unlikely) and risk electoral harm. It's lose-lose for Democrats.

'THE SQUAD' REVIVES FEUD WITH PELOSI: BE AWARE WHEN YOU 'SINGLE US OUT' THAT WE'RE 'WOMEN OF COLOR'

The media outlet Axios shared the results of a small, exclusive poll taken in May of a "crucial group of swing voters." Respondents, "1,003 likely general-election voters who are white and have two years or less of college education" put their approval for Democratic U.S. Reps. Alexandria Ocasio-Cortez, Ilhan Omar, Rashida Tlaib and Ayanna Pressley in low double or single digits.

Only last week did House Speaker Nancy Pelosi, D-Calif., discussing the congresswomen's opposition to the emergency border aid bill -- a bill leadership supported -- seem to dismiss them in an interview with The New York Times, saying, "They're four people and that's how many votes they got." After the president's comments, Pelosi felt obligated to defend the four congresswomen, but that may come at a cost.

Sen. Lindsey Graham, R-S.C., took things a step too far when he called the four "anti-America" communists on "Fox & Friends," another throwback to the McCarthy era, which Graham has previously denounced.

The left swims in a deep sea of hypocrisy when it uses buzzwords like "diversity" and "racism."

Still, this is likely to play well with people who believe too many politicians spend most of their time criticizing America instead of defending it.

The four congresswomen have been critical of the nation they were elected to serve and some have even made anti-Semitic and anti-Israel statements.

The left swims in a deep sea of hypocrisy when it uses buzzwords like "diversity" and "racism." A recent example appeared in the Washington Times. The newspaper reported that congressional Democrats are opposing four "people of color" nominated to federal courts by President Trump. If a Democratic president had nominated these people and Republicans opposed them, is there any doubt the "racist" slur would be hurled at them?

Still, Graham was right when he also said it would be helpful if the president would "aim higher" and speak of their policies, rather than engaging in personal attacks. But their hatred for Israel and anti-America statements ARE their policies.

Graham is correct in this sense: President Trump has the issues on his side. He is winning on things most people care about, especially the economy. Yes, he frequently touts successes, but they are often overshadowed by his personal attacks.

Winning an argument is better than winning a fight. Winning the argument proves your policies are correct. Winning a fight proves nothing, except who is able to beat up another person. It does not advance an agenda.

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There is no excuse for calling U.S. migrant detention centers "concentration camps" and likening our Border Patrol officers to Nazi concentration camp guards, especially since the four freshmen and other Democrats have the power to fix the migrant crisis, but won't because it appears they prefer having the issue to batter Republicans.

If this keeps up, House Democrats who defend such outrageous statements are likely to find themselves in the minority again. Many Americans are fed up with hearing this stuff and are likely to take revenge at the polls.

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