You few who are pretending like the republicans won like a delusional denialridden Trump are mistaken.
The Senate republicans were not in Jeopardy of losing the senate in 2018. They won 2 seats from democrats in Indiana and North Dakota, two heavy red states. Not a surprise.
Dems won the house taking 30+ seats
In the 2020 senate election there are 33 seats to be up for reelection. 22 by the republicans, 11 by the Dems. Non of the dems will really be in jeopardy. They are all in mostly democractic states. There will be at least 9 seats in jeopardy for the republicans in Arizona, Colorado, Georgia, Iowa, Maine, Kentucky, Montana, Texas, and North Carolina.
Trump will not be reelected. The republicans lost the midwest. They lost the house. In 2020 they will lose the senate and presidency.