The fight is for all 435 seats in the House of Representatives.
If the Democrats plan to control the chamber at the expense of the majority of the seats that are occupied, they will have to win at least 23 seats from the Republicans.
Perhaps it will be simple. A large number of Republicans are leaving the ward this year.
Members of the House of Representatives leave for various reasons. Someone retires, someone to a higher position. Some oppose President Trump, others support him. There are those who leave, perhaps because they expect a loss.
The battle for the Senate, which is also controlled by the Republicans, is worth watching. Here, the struggle is only for 35 places out of 100.
Democrats need to win the Republican two chairs in the Senate, so that he came under their control. But this year, the struggle is only for the nine seats occupied by the Republicans, and the majority is likely to remain for the Republicans.
What happens if the Republicans retain control of the Senate, and the Democrats can win the House of Representatives?
In short, it will be a dead end.
In the event that the opposing chambers of the congress are not able to negotiate, the risk of government shutdown, what is called a “shutdown”, from the English shutdown will increase significantly.
The government ceases its work if the congress cannot reach an agreement on financing the activities of the government in the country.
So who will win?
According to public opinion polls, the Democrats will win.
Some experts believe that this year’s election will be wave-like, while the Democrats will win the majority of seats.
All signs indicate that the matter goes to the defeat of President Trump.
Since the Civil War of 1861–65, the Republican Party, when its candidate served as president, has lost an average of 32 seats in the House of Representatives and two in the Senate at each mid-term election.
President Trump’s low ratings (judging by opinion polls) can reduce support for Republican candidates and encourage Democrats.
Trump is one of the most unpopular presidents in modern US history. His ratings for all time in power did not rise above 40%.
And let's not forget the so-called "pink wave". This year more women candidates are participating in elections than ever.
In Michigan, all candidates for governor are women. And Democrat Rashid Tlaib, who is elected to the House of Representatives without a rival, will be the first Muslim woman in Congress.
There are many reasons for the fact that more women participate in elections.
Some candidates say they are doing this because of the defeat of Hillary Clinton in the 2016 presidential election, but the more common reason is irritation caused by the president’s policies.
On the other hand, the level of support for Republicans may continue, because the American economy is flourishing.
Salary in the United States reached its highest level in the last nine years, its growth during Trump’s reign was 3.1% per year. Unemployment continued to decline.
What does all this mean for President Trump?
Scandals one after another shake the White House of Donald Trump.
With respect to members of the Trump team, an investigation is underway in the case of Russia's intervention in the 2016 presidential election. President Trump himself was also implicated in illegal remittances to women, who later stated that they had a connection with him.
Up until now, the Democrats have avoided talking openly about Trump's dismissal or forcing him to resign.
But if this happens, the majority of members of the House of Representatives will have to vote for impeachment.
A similar vote took place in December 1998 in connection with then-President Bill Clinton – he was acquitted when the case was tried in the Senate on charges of giving false testimony and obstructing justice.
What will happen next? The president will be prosecuted in the Senate on charges of "treason, bribery and other serious crimes."
If two-thirds of the senators find him guilty, Trump will be forced to leave his post, Vice President Mike Pence will take his place.
The last vice-president who took the presidency was Gerald Ford, who occupied the White House after Richard Nixon’s resignation in 1974. The current vice president, Mike Pence, used to be the governor of the state of Indiana and is known for his conservative views. He maintains close ties with Christian organizations and calls himself an "Evangelical Catholic".
How big is the significance of such a development of events? In fact, no president has yet left the office through the impeachment procedure.
A more likely scenario will put President Trump in an extremely difficult position – with the Democratic-controlled House of Representatives blocking the implementation of his plans.
And what happens next?
When these elections are held, all thoughts will turn to the next presidential election in 2020.
Voting will take place on November 3, 2020, but the presidential campaign will begin in 2019. President Trump is likely to qualify for the next four-year term, but his Democratic rival will be determined during the primaries, which will begin in January 2020.
In addition to the election of members of Congress, 36 out of 50 state governors are also reelected.
In every US state, there is a chosen governor, the main political figure of the state, who considers its laws and has the authority to approve candidates for local officials and judges.
26 out of 36 reelected governors are Republicans.
In the midst of the presidential campaign, governors play a significant role by supporting candidates from their parties, helping them find sponsors and mobilize volunteers.
Thus, the coming to power of new governors as a result of mid-term elections will have a serious impact on the presidential campaign in 2019 and 2020.