By Glen Johnson, Globe Staff

Elizabeth Warren, trying to ride her reputation as a Wall Street enforcer to the US Senate, today released a new radio ad calling for enhanced government regulation in the aftermath of JPMorgan Chase’s $2 billion trading loss. “I stood up to big banks. I took on their army of lobbyists and help win the fight for a consumer protection agency,” the Democrat says in the new spot. “Wall Street isn’t going to change its ways until Washington gets serious.”

By Noah Bierman, Globe Staff

Senate candidate Elizabeth Warren today called on JPMorgan Chase chief executive officer Jamie Dimon to resign from New York Federal Reserve Bank board after his company’s $2 billion trading loss. Three top traders at the firm are being replaced today. Warren spoke with CNN and CBS about the latest Wall Street crisis, calling it a symptom of a destructive attitude. She said that banks should get back in the business of old fashioned banking, rather than the complex business transactions.

By Bobby Caina Calvan, Globe Staff

Representative Barney Frank, who cowrote the landmark law designed to reform how Wall Street does business, said the massive losses disclosed Thursday by banking giant JPMorgan is proof that regulation of the country’s financial institutions. “The argument that financial institutions do not need the new rules to help them avoid the irresponsible actions that led to the crisis of 2008 is at least $2 billion harder to make today,” Frank said today.

By Noah Bierman, Globe Staff

Fall River dentist David Steinhof plans to file his intent to run today as a Republican for election the Fourth Congressional District, the seat that will be open as a result of Barney Frank’s retirement, Steinhof’s campaign manager said. The Republican primary field already includes Dr. Elizabeth Childs and Sean Bielat, who built his profile by challenging Frank for reelection in 2010. Democrats in the field include Joseph Kennedy III, Herb Robinson, Paul Heroux, and Jules Levine.

By Callum Borchers, Globe Correspondent

A new poll of three swing states shows a virtual tie between President Obama and Mitt Romney in Florida and Ohio, and a single-digit lead for the president in Pennsylvania. The Quinnipiac University survey, published Thursday, gave Obama a 47-39 edge in the Keystone State. Obama leads Romney, 44-42, in Ohio but trails, 44-43, in Florida. Since 1960, no presidential candidate has been elected without carrying at least two of these three states.

By Callum Borchers, Globe Correspondent

With Newt Gingrich set to officially exit the presidential race Wednesday, the Obama campaign preempted his anticipated endorsement of Mitt Romney by releasing a highlight reel of Gingrich’s strongest anti-Romney statements. In the video, Gingrich calls Romney a liar and characterizes him as a corporate raider. The Romney campaign did not respond directly to the ad’s content but continued to accuse the president of employing political distractions to avoid discussing the economy.

By Glen Johnson, Globe Staff

Democratic Senate candidate Elizabeth Warren is using the words of President Obama to make the case that she can get action in Washington. In a new television ad set to start airing statewide tonight, the president is seen in the Rose Garden lauding Warren’s work to establish the Consumer Financial Protection Bureau. “She came up with an idea for a new, independent agency that would have one simple, overriding mission: standing up for consumers and middle-class families,” Obama says.

By Callum Borchers, Globe Correspondent

The Obama campaign charges in a new ad airing in three swing states that Mitt Romney’s economic plan is built on outsourcing jobs to foreign countries. “As a corporate CEO, he shipped American jobs to places like Mexico and China,” a male narrator says in the ad, running in Iowa, Ohio and Virginia. “As governor, he outsourced state jobs to a call center in India. He’s still pushing tax breaks for companies that ship jobs overseas.”