While the White House has condemned anti-Muslim rhetoric as divisive, the administration is also worried such talk will hurt antiterrorism efforts.

[Donald Trump's] allegations are completely unfounded.

If California is any indicator, I'm proud that the public here saw right through it and registered in record numbers and voted in record numbers.

Donald Trump and his team have not provided any evidence of widespread fraud in this year's election.

And I'm hoping that between now and two years from now and four years from now and future election cycles, people have gotten past the hype and the hysteria of these most recent allegations.

[people] very fact that it's decentralized makes it literally impossible to try to hack or rig the results.

If anything, a message back to [Donald] Trump is, if you have proof, if you have evidence, please bring it forward. Procedures are in place to investigate any real voter fraud.