Sen. Kamala Harris Kamala HarrisButtigieg stands in as Pence for Harris's debate practice First presidential debate to cover coronavirus, Supreme Court Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (D-Calif.) on Tuesday issued a call for states to focus on election security and possibly adopt paper ballot measures, telling a crowd of New Hampshire voters that paper ballots remain the securest way to cast votes.

Speaking at the "Politics & Eggs" breakfast in New Hampshire, the 2020 Democratic contender told attendees that her infrastructure plan as president would include investments in election security at the state level.

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"We have proposed that part of the investment in infrastructure has to be upgrading the infrastructure of states around elections," Harris said Tuesday. "Because guess what? As it turns out, for all that technology has brought us, good and bad, the best way to conduct secure elections? Paper ballots."

"'Cause, the way I kind of say it, half joking, is 'Russia can't hack a piece of paper,' " Harris added.

Senator Kamala Harris speaks at a Politics and Eggs breakfast in Manchester, New Hampshire. https://t.co/ar1QdP4Iv4 — Circa (@Circa) February 19, 2019

Her remarks at the annual event in the early primary state come as Harris has supported the Secure Elections Act, a bill that stalled in the last Congress but would have required states to have backup paper ballots at the ready in order to receive federal funding for cybersecurity purposes.

That bill is expected to be reintroduced in upcoming months and is supported by top senators on the Intelligence Committee including Sens. Richard Burr Richard Mauze BurrRep. Mark Walker says he's been contacted about Liberty University vacancy Overnight Defense: Trump rejects major cut to military health care | Senate report says Trump campaign's Russia contacts posed 'grave' threat Senate report describes closer ties between 2016 Trump campaign, Russia MORE (R-N.C.) and Mark Warner Mark Robert WarnerIntelligence chief says Congress will get some in-person election security briefings Overnight Defense: Trump hosts Israel, UAE, Bahrain for historic signing l Air Force reveals it secretly built and flew new fighter jet l Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' House approves bill to secure internet-connected federal devices against cyber threats MORE (D-Va.).

Sen. James Lankford James Paul LankfordMcConnell works to lock down GOP votes for coronavirus bill Charities scramble to plug revenue holes during pandemic Warren calls for Postal Service board members to fire DeJoy or resign MORE (R-La.), a co-sponsor of the bill, said last year that the measure “adequately helps the states prepare our election infrastructure for the possibility of interference from not just Russia, but possibly another adversary like Iran or North Korea or a hacktivist group.”

Twelve Russian nationals were indicted last year as a result of the special counsel investigation looking into Russia's election interference in the 2016 election. They were charged with using fake and stolen identities to influence voters with disinformation and divisive news stories during the election.

There is no evidence that Russia's election meddling resulted in actual ballots being tampered with, but a Department of Homeland Security report late last year found that hackers have attempted to breach election systems in the U.S. as many as 160 times since August of 2018.