(CNN) The state of play in key races has shifted since election night almost one week ago, offering a different picture of where the balance of power will stand in Washington come January.

Democrats have taken the lead in a handful of key House races while the margin in Florida's Senate race has narrowed, forcing a recount.

A key US Senate race in Arizona was settled on Monday night -- six days after Election Day -- when Republican Rep. Martha McSally conceded to Democratic Rep. Kyrsten Sinema.

Two governors' races remain undecided in Georgia and Florida

Here's a breakdown of where key races stand:

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