Sen. Amy Klobuchar Amy KlobucharSocial media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (D-Minn.) hit back at President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE Sunday after he mocked her for launching her presidential campaign in wintry conditions, telling him over Twitter that she was "looking forward to debating you about climate change."

"Science is on my side, @realDonaldTrump. Looking forward to debating you about climate change (and many other issues)," Klobuchar tweeted.

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"And I wonder how your hair would fare in a blizzard?" she added.

Science is on my side, @realDonaldTrump. Looking forward to debating you about climate change (and many other issues). And I wonder how your hair would fare in a blizzard? ☃️



Everyone else can join my team and contribute at https://t.co/Hz91NGE8hB https://t.co/Xjjz9I2Fw7 — Amy Klobuchar (@amyklobuchar) February 10, 2019

Klobuchar announced her candidacy on Sunday in Minneapolis, where scores of supporters stood outside in heavy snowfall.

Trump afterward took to Twitter to criticize her campaign rollout.

"Amy Klobuchar announced that she is running for President, talking proudly of fighting global warming while standing in a virtual blizzard of snow, ice and freezing temperatures," Trump tweeted. "Bad timing. By the end of her speech she looked like a Snowman(woman)!"

Klobuchar during her speech highlighted the ways she hoped to tackle environmental issues, including by saying she would direct the U.S. to rejoin the Paris climate agreement "on day one" of her administration. The Trump administration announced the U.S. was leaving the accord in 2017.

Klobuchar also vowed to "put forth sweeping legislation to invest in green jobs and infrastructure" if elected.

Klobuchar became the latest Democrat to enter the 2020 presidential campaign, joining Sens. Elizabeth Warren (Mass.), Cory Booker (N.J.), Kamala Harris (Calif.) and Kirsten Gillibrand (N.Y.), among others.