Sen. Susan Collins (R-Maine) is up against a steep challenge for her seat for the first time since 1996, according to a Colby College poll, which shows her in a statistical tie with her expected Democratic opponent.

Why it matters: As one of the most centrist Republicans in the Senate during Trump's presidency, Collins has served as a pivotal swing vote on a number of key issues.

President Trump announced Tuesday that he would commute former Illinois Gov. Rod Blagojevich's 14-year prison sentence for extortion, bribery and corruption — as well as issue full pardons for former San Francisco 49ers owner Edward DeBartolo Jr., former NYPD Commissioner Bernie Kerik and financier Michael Milken.

The big picture: The president's clemency spree largely benefitted white-collar criminals convicted of crimes like corruption, gambling fraud and racketeering, undercutting his message of "draining the swamp."

The nonpartisan watchdog group Campaign Legal Center (CLC) filed a complaint with the Federal Election Commission Tuesday that alleges the Buttigieg campaign improperly coordinated with the super PAC VoteVets on TV advertising in Nevada.

Background: On Feb. 5, Buttigieg campaign senior strategist Michael Halle tweeted, "Pete’s military experience and closing message from Iowa work everywhere especially in Nevada where it’s critical they see this on the air through the caucus."

Sen. Elizabeth Warren joined Sen. Bernie Sanders on Tuesday in accusing former New York Mayor Michael Bloomberg of buying his way into the 2020 election, ahead of the ninth Democratic debate on Wednesday.

What she's saying: In a tweet, Warren wrote: "It’s a shame Mike Bloomberg can buy his way into the debate. But at least now primary voters curious about how each candidate will take on Donald Trump can get a live demonstration of how we each take on an egomaniac billionaire."

Jason Klitenic, the top lawyer at the Office of the Director of National Intelligence (DNI), is resigning from his position, Politico first reported.

Why it matters: Klitenic wrote a letter to the top lawmakers on the Senate and House Intelligence committees in September informing them that — after consulting with the Justice Department — acting DNI Joseph Maguire would not turn over the whistleblower complaint about President Trump's now-infamous phone call with Ukrainian President Volodymyr Zelensky,

Assistant Attorney General Stephen Boyd sent a letter to House Judiciary Chairman Jerry Nadler (D-N.Y.) Tuesday informing him that the U.S. attorneys for the Eastern District of New York and the Western District of Pennsylvania are reviewing "unsolicited" information from the public related to matters involving Ukraine.

Why it matters: Nadler had requested an explanation for the "intake process" that Attorney General Bill Barr stated had been set up in order to receive information that Rudy Giuliani had obtained about the Bidens in Ukraine.

2020 candidate Mike Bloomberg on Tuesday released a criminal justice reform agenda that focuses on reducing racial disparities in incarceration and helping reintegrate those who have been jailed.

Why it matters: The former New York City mayor's criminal justice record has been under scrutiny in the wake of the resurfacing of a 2015 audio clip of him defending the city's stop-and-frisk policy, which mostly impacted black and Latino people before it was ruled unconstitutional in 2013.

Michael Bloomberg is a late entry to the Democratic primary, launching less than three months out from the Iowa caucuses. The billionaire is known for his former role as mayor of New York City from 2002 to 2013 and his current position as CEO of Bloomberg LP.

Telemundo will announce on Tuesday the launch of a multi-million dollar voter initiative aimed at Latinos called “DECISIÓN 2020," executives tell Axios.

Why it matters: "This is a big moment for the Hispanic community," says Cesar Conde, Chairman of NBCUniversal International Group and NBCUniversal Telemundo Enterprises. "For the first time, Latinos will be the largest ethnic voting block this election, making up 13-14% of all eligible voters."

Money alone can’t buy a presidential election, but it surely gets you VIP access.

Why it matters: Billionaire Michael Bloomberg is duking it out with Billionaire Donald Trump, often on Billionaire Jack Dorsey’s Twitter and in ads on Billionaire Mark Zuckerberg’s Facebook, all chronicled in Billionaire Jeff Bezos’ Washington Post. 

Michael Bloomberg qualified Tuesday for this week's Democratic debate in Las Vegas after notching 19% in the latest NPR-PBS NewsHour-Marist poll.

Why it matters: The debate on Wednesday in Las Vegas, just before the Nevada caucus, eliminated the requirement that candidates onstage have a specific number of donors. Bloomberg, who has been self-funding his campaign, will face off against his 2020 competitors for the first time.

The Federal Judges Association told USA Today the independent group called an emergency meeting Tuesday to address "growing concerns" about the Department of Justice, Attorney General Bill Barr, President Trump and the intervention of "politically sensitive cases."

Why it matters: This is another example of the scrutiny Barr is facing from not only Democrats but also members of the legal community — from both sides of the political aisle — following his intervention in the sentencing of President Trump's associate Roger Stone last week.

The alarms are increasingly sounding over Nevada's Democratic caucus, which is just five days away.

Why it matters: Similar issues to the ones that plagued Iowa's caucus seem to be rearing their ugly heads, the WashPost reports.