Donald Trump is set to return to the White House, having promised action on issues including immigration, the economy and the war in Ukraine.He looks likely to enjoy plenty of support for his political agenda in Congress after his Republican Party regained control of the Senate.In his victory speech, Trump vowed he would "govern by a simple motto: Promises made, promises kept.

We're going to keep our promises".But in some cases, he has given little detail of how he might achieve his aims.Asked in 2023 by Fox News whether he would abuse his power or target political opponents, he replied he would not, "except for day one"."No, no, no, other than day one.

We're closing the border, and we're drilling, drilling, drilling.

After that, I'm not a dictator."1) Deport undocumented migrantsWhile campaigning, Trump promised the biggest mass deportations of undocumented migrants in US history.He also pledged to complete the building of a wall at the border with Mexico that was started during his first presidency.The number of crossings at the US southern border hit record levels at the end of last year during the Biden-Harris administration, before falling in 2024.Experts have told the BBC that deportations on the scale promised by Trump would face huge legal and logistical challenges - and could slow economic growth.2) Moves on economy, tax and tariffsExit poll data has suggested the economy was a key issue for voters.