Nearly three weeks after Joe Biden‘s disastrous debate performance, several Democrats are being eyed as replacements for the president should he step aside from the campaign.

As the president’s calls with Democrats and prime-time interviews have reportedly done little to quell concerns about his age and mental acuity, various candidates have been floated for the top of the Democratic ticket. While Vice President Kamala Harris and Govs. Gavin Newsom (D-CA) and Gretchen Whitmer (D-MI) have been the top names tossed around, four other names are being floated as replacements for Biden.