Former Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeGOP lawmakers stick to Trump amid new criticism Kelly holds double-digit lead over McSally in Arizona: poll Trump asserts his power over Republicans MORE (R-Ariz.) said Tuesday that he believes former Vice President Joe BidenJoe BidenHillicon Valley: Biden calls on Facebook to change political speech rules | Dems demand hearings after Georgia election chaos | Microsoft stops selling facial recognition tech to police Trump finalizing executive order calling on police to use ‘force with compassion’ The Hill’s Campaign Report: Biden campaign goes on offensive against Facebook MORE is the Democrat who should most worry Republicans heading into the 2020 presidential election.

“Joe Biden is, I think that strikes fear in a lot of Republicans,” Flake said on “CBS This Morning,” where he is a contributor.

“He can speak to those states that President TrumpDonald John TrumpSenate advances public lands bill in late-night vote Warren, Democrats urge Trump to back down from veto threat over changing Confederate-named bases Esper orders ‘After Action Review’ of National Guard’s role in protests MORE won in the Rust Belt in particular, and he’s seen as more of a centrist,” Flake added. “He was a senator for 30-some years. He knows how to work with the Senate with the Congress and I think that’s certainly one that worries Republicans.”

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“Joe Biden strikes fear in a lot of Republicans. He can speak to those states that Pres. Trump won… and he’s seen as more of a centrist. He knows how to work with the Senate, with the Congress, and I think that’s certainly one that worries Republicans.” — @JeffFlake pic.twitter.com/b1IcZxOBr1

— CBS This Morning (@CBSThisMorning) March 12, 2019

Biden has been mulling a potential 2020 campaign for months, and sources familiar with his plans have told The Hill that he is nearly certain to jump into the race. The former vice president said late last month that his family wants him to run.

Sens. Elizabeth Warren (D-Mass), Kamala Harris (D-Calif.), Kirsten Gillibrand (D-N.Y.), Cory Booker (D-N.J.), Amy Klobuchar (D-Minn.) and Bernie Sanders (I-Vt.) are among those who have already entered the race for a chance to take on President Trump next year.

Biden has long hovered at or near the top of polling among Democrats on their preferred 2020 candidate. A poll released last month by the left-leaning Public Policy Polling firm showed Biden and Trump in a statistical dead heat in a hypothetical 2020 match-up.

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