Ukraine reports 5,276 new COVID-19 cases Zelensky: Every third Ukrainian considers road construction one of greatest achievements of 2021 Ukraine ready to implement Minsk agreements, but Russia's desire needed - Yermak Michel: EU unanimously agree to roll over economic sanctions against Russia Actions by Ukraine's partners will help prevent worst-case scenario - Zelensky COVID-19 in Ukraine: Health officials confirm 8,899 daily cases as of Dec 17 Macron tells Zelensky he declared support for Ukraine in call with Putin Zelensky, Scholz discuss gas transit through Ukraine after 2024 Ukraine ready for any format of talks with Russia - Zelensky Ukraine’s only journalist in Russia facing extremism charges - lawyer PM Shmyhal: First two applications for investment projects worth $96 million filed Zelensky, PM of Italy discuss security situation around Ukraine President signs off State Budget 2022 London considering all options for responding to Russia's aggression against Ukraine Putin, Biden to hold another round of talks Some 260,000 Ukrainians “victims of human trafficking” over 30 years - prosecutor general Ukraine plans to create center to protect energy infrastructure from cyber attacks No clear idea so far when Normandy Four top diplomats set to meet - German Ambassador Ukraine receives EUR 600M in macro-financial assistance from EU Zelensky holds phone conversation with PM of Israel Ukraine sets new daily COVID vaccination record MFA: European Union has not yet removed Ukraine from list of safe countries Kyiv records 1,023 new COVID-19 cases, 29 deaths G7 ambassadors welcome adoption of law on NABU status Ukraine can increase Covid vaccination rates to 1.5M a week – Liashko

Former U.S. Vice President Joe Biden has shown surprising strength in the first three weeks of his campaign for the Democratic presidential nomination, prompting a persistent question: Can anyone stop him?

Biden holds a significant lead in opinion polls over the 23 other Democratic contenders. Republican President Donald Trump is treating him like his top threat in 2020.

Ahead of his formal campaign kickoff on Saturday at an outdoor rally in Philadelphia, Biden, 76, has seemingly put to rest doubts about his age and his ability to raise money as well as questions over whether he is out of step with the Democratic Party.

“The rest of the race now revolves around Joe Biden,” said Joe Trippi, a longtime Democratic operative who is not aligned with the campaign.

But traps may lie ahead. The first major opportunity for Biden’s competitors to dent his lead comes next month in the first of a dozen Democratic presidential debates.

Biden could find himself as the leading target of attacks, particularly from progressives. He also has a history of gaffes, something that could be problematic in the national spotlight.

“I’ve long said Joe Biden’s best days will be the beginning of this campaign,” said Charles Chamberlain, executive director of the progressive advocacy group Democracy for America.

According to Real Clear Politics, Biden is backed by about 40% of the Democratic electorate on average in opinion polls, giving him more than a 20 percentage-point lead over his nearest challenger, U.S. Senator Bernie Sanders of Vermont.

Experienced presidential strategists told Reuters that while they expect some other Democrats to eventually become top contenders, Biden’s strength is likely sustainable.

They cited two main factors: The massive Democratic field makes it difficult for any one candidate to stand out, and voters tend to be risk-averse when seeking a candidate to topple a sitting president.