MANCHESTER, N.H. Sen. Amy Klobuchar (D-Minn.) has never been good at hiding her dislike of former South Bend, Indiana, Mayor Pete Buttigieg . And at the Democratic debate here Friday night, she went directly for his voters.

Klobuchar and Buttigieg, whose Iowa caucus showing has given him a major boost in the polls here ahead of Tuesday nights New Hampshire primary, are competing for many of the same voters. (Sen. Elizabeth Warren of Massachusetts and former Vice President Joe Biden are often in the mix as well, though Klobuchar and Buttigieg seem to be almost directly going head-to-head.)

On Friday night, Klobuchar decided to win them over by aggressively attacking another candidate they like, a strategy that risks alienating them.

Im not a political newcomer with no record, she said in her closing statement, a not-so-subtle reference to a college town mayor who took office with fewer than 11,000 votes.

We have a newcomer in the White House, and look where it got us. I think having some experience is a good thing, she said directly to Buttigieg earlier in the debate. (Buttigieg didnt directly respond, since the moderator went to Sen. Bernie Sanders of Vermont instead of to the former mayor.)

Klobuchars aggression was clearly a planned strategy. When a reporter noted Klobuchar had managed to attack Warren, Sanders and Buttigieg in a single answer on health care, a Klobuchar communications staffer noted it was an example of big Amy energy.

The Minnesotan was not alone in her attacks on Buttigieg. Sanders also got in some direct swipes during an exchange over campaign finance: I dont have 40 billionaires, Pete, contributing to my campaign, coming from the pharmaceutical industry, coming from Wall Street.

Buttigieg, for the most part, was able to defend against the attacks. But he had a particularly grim moment. When a moderator pressed him on his oversight of the police in South Bend on issues of race, his answer came off as robotic and practiced rather than articulate and thoughtful.

The overall focus on Buttigieg and Klobuchar during the debate means if there is real movement in the New Hampshire polls in the three days before Tuesdays vote, its likely to involve Buttigieg voters switching to Klobuchar or maybe vice versa.

Here are four other takeaways from the New Hampshire Democratic presidential primary debate:

Biden Wakes Up

Bidens first answer of the night was a disaster. Asked about his recent criticisms of Sanders and Buttigieg, Biden instead chose to attack his own standing in the race.

Its a long race, he said. I took a hit in Iowa, and Ill probably take a hit here. Traditionally, Bernie won by 20 points last time. And usually its the neighboring senators that do well.

It makes sense for Bidens campaign to downplay his chances in New Hampshire. It doesnt make sense for Biden, who is still leading in national polling and in position to do well in Nevada and South Carolina, to open up the debate in New Hampshire by downplaying his chances there.

Biden then went on to only half-heartedly deliver the attacks on Buttigiegs experience and Sanderss socialism that he delivered with gusto at a campaign event earlier in the week.

But his performance quickly got better. His praise of Army Lt. Col. Alexander Vindman, who was ousted from the White House on Friday after hed provided damaging testimony about President Donald Trump to the House Judiciary Committee, brought the crowd to its feet and is likely to earn plenty of replays on cable news. He also delivered a sharper attack on Sanderss past opposition to gun control measures.

It seems unlikely Bidens performance was strong enough to turn around his performance in New Hampshire. But it might have been good enough to stanch the bleeding in other states. (Bidens team said he raised more money on Friday than on any previous debate day.)