Jon Lieber, head of Eurasia Group's coverage of political and policy developments in Washington, DC shares his perspective on US politics:

Is the Republican Party still Trump's party to lead after the midterm elections?

The biggest news this week, other than Taylor Swift tickets going on presale, is the announcement by former President Donald Trump that he is going to run for president a third time. Trump's role with Republicans is a huge source of discord within the party right now. He remains one of, if not the most popular Republicans, but he is not delivering the electoral results the way he once did. Trump-aligned candidates had some of the worst nights in the midterm elections, in some cases trailing other Republicans from the same state by 20 points or more.

This is a huge dilemma for Republicans who can't win with him, but they also probably can't win without him, as there is a hard core of Trump-supporting voters within the GOP base who helped Trump candidates win their primaries in Ohio, Pennsylvania, and Arizona. If Trump does win the primary, there are a lot of people in both parties who think he is so toxic, it will give the election to the Democrats in 2024. Of course, depending on the state of the economy. But if he does not win the primary, there are serious questions as to how conciliatory he's willing to be, and if he would help the eventual Republican candidate or just take his base and go home.