US President Donald Trump, looking to win a second term, and his Democratic rival, Joe Biden, have traded sharp criticisms as the presidential race enters its final phase.

The Republican president described his Democratic opponent as "stupid", to respond to the former Vice President by saying that the master of the White House lacks "the boldness" to address the Coronavirus "Covid-19" pandemic.

While Biden and Senator Kamala Harris, his choice for vice president, headed to the swing states of Wisconsin and Pennsylvania, the president held a surprise press conference at the White House.

And again, Trump proposed the possibility of reaching a vaccine against the Corona epidemic by the date of the presidential elections, which is excluded by many experts, and accused his opponents in the elections of introducing politics into the issue of the vaccine, after Harris said that she would not trust what Trump said about the safety and effectiveness of such a vaccine.

Trump talked about the acceleration of job creation after losing tens of millions of jobs, and stressed that the United States is on its way to overcoming the pandemic, describing Biden as "stupid" and "wanting to throw our country into the arms of the virus, throwing our families into the embrace of left-wing mobs, and throwing our jobs into the arms of" China".

Funky rivalry

Traditionally, the Labor Day holiday (a public holiday in America celebrated on the first Monday in September) signals the start of the final stage of the presidential race less than two months before the November 3 election, whose campaign is witnessing a further confrontation. It is about traditional competition, and multiple crises overlap.

Candidates who usually commute from state to state to deliver speeches in front of crowds limit their travel and rely more on video posts.

Anti-racism protests and counter-actions often add unpredictable elements to election campaigns, the most recent being the organization of pro-Trump car convoys in the suburbs of Portland.

On Monday, Biden traveled to Pennsylvania, his hometown, where he met with union leaders, then held a meeting with leaders of the American Federation of Labor and Conference of Industrial Organizations.

During the meeting, Biden said that Trump "lacked the courage to confront Covid-19."

He continued, "We realize that his rich friends consider him wonderful, but the rest of us do not consider him as such," criticizing Trump over a report by the "Atlantic" newspaper accusing the Republican candidate of insulting the military and veterans.

"He's honestly not an American," Biden said.

Although Trump denied the validity of what was stated in the report and described it as a "hoax", an opinion poll showed that the support for the Republican president among the military is lower compared to the size of their support for Biden.

"I'm not saying that the military (leadership) is in my love, but the soldiers," Trump told reporters at the White House.

Earning the Wisconsin votes

Biden, 77, accelerated the pace of his campaign last week, but given the risks of "Covid-19", he is more cautious than Trump, "74," who participated in election rallies that included hundreds of his supporters each.

Polls still show Biden a steady lead over Trump, who, like his rival, is increasingly focused on key Midwestern states, such as Wisconsin, which are expected to witness a frantic race.

Harris headed to Wisconsin, where she followed the lead of the Democratic presidential candidate, as the family met Jacob Blake, an African American, whose injury last month by police bullets sparked a wave of protests and riots.

Observers believe that her departure to Wisconsin could be a factor in the race given that the rate of black participation in elections in this state decreased in 2016.

In turn, US Vice President Mike Pence went to Wisconsin, where he will deliver a speech in the city of "Lacrosse".

Confronting racism

So far, the Corona virus has largely silenced the clamor of the election campaigns, as it forced Biden to spend a large part of his time at his home in Delaware, prompting Trump to criticize him and call him out of his "basement".

But anti-racism protests, which sometimes witness violence and continue without interruption, create an atmosphere of tension and warrant sharp rhetoric from the candidates.

Trump holds "radicals" and "chaos" responsible for the violence, presents himself as a candidate for law and order, and openly supports protesters from the far right.

Tensions escalated in Portland on Monday, after hundreds of Trump supporters, some carrying weapons and uniforms, gathered to participate in motorcades in the city, which has seen protests that lasted more than 100 days and resulted in two deaths.

It is also expected that protests will be organized for the sixth night in Rochester, New York, where black American Daniel Broad, who was suffering from psychological disorders, died after police officers put a cloth bag on his head to prevent him, according to what they said, from spitting, and kept him fixed on the ground by force until he lost consciousness .

Recently, Biden strongly condemned the violence and looting that permeated some of the protests, but pledged to speak out against racism, describing it as the "original sin" in the country.