The U.S. gave the final go-ahead Friday to the nation’s first COVID-19 vaccine, marking what could be the beginning of the end of an outbreak that has killed nearly 300,000 Americans.

President Donald Trump aims to take credit Tuesday for the speedy development of forthcoming coronavirus vaccines, even as his administration is coming under scrutiny for failing to lock in a chance to buy millions of additional doses

Pfizer formally asked U.S. regulators Friday to allow emergency use of its COVID-19 vaccine, starting the clock on a process that could bring limited first shots as early as next month and eventually an end to the pandemic

Pfizer said Monday that an early peek at the data on its coronavirus vaccine suggests the shots may be a robust 90% effective at preventing COVID-19, putting the company on track to apply later this month for emergency-use approval

Democrat Joe Biden was on the cusp of winning the presidency on Friday as he opened up narrow leads over President Donald Trump in the critical battlegrounds of Georgia and Pennsylvania.

For 40 hours, President Donald Trump fumed in private and tweeted his grievances in all caps.

Judges in Georgia and Michigan quickly dismissed Trump campaign lawsuits Thursday, undercutting a campaign legal strategy to attack the integrity of the voting process in states where the result could mean President Donald Trump's defeat.

The fate of the United States presidency hung in the balance Wednesday as Democratic challenger Joe Biden picked up a win in Wisconsin while fighting President Donald Trump in other battleground states

The fate of the United States presidency hung in the balance Wednesday morning, as President Donald Trump and Democratic challenger Joe Biden battled for three familiar battleground states — Wisconsin, Michigan and Pennsylvania