No, raise the debt ceiling
Both Republicans and Democrats are in favor of raising the national debt ceiling, but Republicans demand to cut spending

In 2011, it was possible to agree on raising the amount of debt only three days before the “deadline”. The compromise was eventually reached after President Barack Obama's administration agreed to cut defense and other spending.
The US threatened to default on June 1: how it happened and what to expect
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Even if there is a currency, no one will abandon the dollar, the further dominance of the dollar depends on the United States itself.
Russia, China, India and other countries accept the dollar and do not plan to abandon it 100%, settlements are also carried out in terms of dollars. The well-being of the dollar depends on the United States itself, if they act from a position of strength, then the rejection of the dollar will accelerate and a new currency will be issued. The BRICS countries will be more active in expanding trade in national currencies, as the use of the dollar as a sanctions stick has undermined confidence in it

Most likely, the BRICS will have to abandon India. Since she does not like to trade for the yuan, she does not want to give up the dollar. Because of this, the decisions of the BRICS groups, including the creation of a currency, are very difficult, at least that's how it is presented in the news. If the BRICS currency is backed by real resources, including land and rare earth metals, Russia will regret it in the future. Because it will not be able to compete with China, which will eventually be able to demand land in exchange for currency.
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Democratic candidate
Republicans will not be forgiven for dismissals. Democrats are already winning party elections in states where Republicans used to win.

Even after the change of Trump, US policy will not change. They need to bring jobs back to the country, and this should be beneficial to employers, and this can only be done with the help of a weak dollar and protective tariffs or other unpopular reforms.
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The same thing will happen to the dollar that is now happening to all other currencies that are now devalued against the dollar
If the US dollar ceases to be the world's reserve currency, this will lead to a total collapse and collapse of the US economy, which is not far from the collapse of the country.

Why is the status of the world reserve currency so important for the United States? This allows them to print dollars almost uncontrollably – if it causes currency devaluation in other powers, then everything is OK. Every time a state or a person buys a dollar, he takes on part of the US government debt.
Challenging the dollar is the main fear of the United States.
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