And the election year shuffles start:

William Daley is stepping down as White House chief of staff and budget director Jack Lew is taking over the President Obama’s team as it heads into a tough election year, senior administration officials say.

Daley gave his letter of resignation to the president in a private meeting in the Oval Office last week, recounting the administration’s successes of his one year on the job and saying it was time for him to return to his hometown of Chicago.

Obama plans to announce the change in leadership in a public event Monday afternoon. The official shift will take place at the end of the month, giving Lew time to complete the administration’s budget proposal while Daley leads the team through the crafting of the State of the Union address due in two weeks.

This will be the start of many changes to come as Obama tries to get things ready for a second term. Any bets on who might be next?