President Joe Biden’s campaign insisted Friday that he will remain at the top of the Democratic ticket, stressing in a new memo that Biden still has the support of voters, even as a growing number of Democratic lawmakers call on him to drop out.

“While voters consistently mention President Biden’s age when contacted, our target voters — both reengagement and true swing voters — are still planning to vote for him, making it clear the debate has not hurt support among the voters who will decide this election,” says the memo, first reported by NBC News.

“Joe Biden has made it more than clear: he’s in this race and he’s in it to win it. Moreover, he’s the presumptive nominee, there is no plan for an alternative nominee,” the memo said.

Eleven Democrats in the House of Representatives and one Democratic senator joined the ranks of those calling on Biden to drop his reelection bid on Friday, bringing the number of congressional Democrats urging him to step aside to 34.