She meant to spend Sunday in Iowa, where the leadoff caucuses will be the first test of candidates' viability.
The Massachusetts senator revealed on New Years Eve that she was forming an exploratory committee to test the waters for her likely presidential run. The backing could prove valuable for Warren given his status as a rising young Democratic star and his friendship with her potential 2020 rival, former Texas Rep. Beto O'Rourke.
Despite sub-zero temperatures and a blustery wind, an estimated crowd of several thousand turned out to hear the MA senator pledge to fight corruption in Washington, level the economic playing field and reform the USA democratic process.
Warren, a former law professor at Harvard University specializing in bankruptcy and commercial law, was a key architect of Barack Obama-era regulations to protect consumers from predatory lenders.
Her first husband, Jim Warren - to whom she was married during the period she described, from 1968 to 1978, and with whom she has two children - worked as NASA mathematician. After Republicans blocked her from running the Consumer Financial Protection Bureau, an agency she helped create, she ran for the Senate in 2012 and unseated a GOP incumbent. "It's a challenging time", said Pamela Baldwin, 55, of Arlington, who said she likes Warren as a senator but believes sexism will prevent a woman from becoming president in 2020.
Warren and the other women running so far, among whom are Senators Kamala Harris and Kirsten Gillibrand, are hoping to build on the success of women candidates who played a significant role in Democrats regaining control of the U.S. House of Representatives in November's congressional elections.
"I can't go back", Warren told the Post.More news: Measles cases confirmed in northwest Harris County
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That challenge is on display this weekend as Democratic presidential contenders - or those considering a run - fan out across the crucial early-voting states. A year before any ballots are cast in a Democratic primary, many of those candidates are spending this weekend talking to voters in the early-nominating states of Iowa, New Hampshire and SC. In coming days, she plans events in Georgia, South Carolina, Nevada and California. And as a senator from Vermont who won the New Hampshire primary, he would likely go into the Granite State as an early favourite if he made a decision to run again.
Warren's case to voters is her up-by-the-bootstraps biography, her consistency on issues, and a persistency bordering on the relentless.
The campaign launch will test whether the controversy is simply a Washington obsession or a substantive threat to her candidacy.
Carmen Reyes is among the many residents who say Warren's announcement is a positive development as the city recovers from September's natural gas explosions and fires.
One aspect of President Trump's policies that Ms Warren has remained fiercely critical of, is their immigration policy.
Warren enters a crowded presidential field, as Democrats tell pollsters they want to find the candidate most able to beat Donald Trump.