Washington (CNN) -- Before Rep. Anthony Weiner's Twitter scandal broke, he was best known for a passionate, theatrical rant on the House floor over a bill that funded health care costs for 9/11 first responders.
And he might have become better known as New York's next mayor, had he not put his political future in jeopardy with his sexting scandal.
Weiner, 46, was first elected to the House in 1998 after his political mentor, then-Rep. Chuck Schumer, decided to run for the Senate. He has been a reliable liberal voice for the solidly Democratic 9th District, which encompasses parts of Brooklyn and Queens.
Read what Weiner's constituents are saying
Weiner basically ran unopposed in 2006 and 2008 and won by 22 points over his Republican opponent last year, easily avoiding the GOP tidal wave that swept over the House.
When the James Zadroga 9/11 Health and Compensation Act was hung up in the House last year, Weiner tore into Republicans who opposed the bill over what they said were procedural concerns, including Republican Rep. Peter King, a fellow New Yorker.
"It's Republicans wrapping their arms around Republicans rather than doing the right thing on behalf of the heroes," Weiner screamed. "It is a shame. A shame! If you believe this is a bad idea to provide health care, then vote no! But don't give me the cowardly view that 'Oh if it was a different procedure...'"
When King tried to interrupt him, Weiner aimed at King.
"The gentleman gets up and yells, trying to intimidate people into believing he's right -- he is wrong!" he shouted. "The gentleman is wrong! The gentleman is providing cover for his colleagues rather than doing the right thing!"
Watch Weiner's House floor speech
Critics say Weiner's rant was aimed at elevating his stature in New York politics rather than in Congress.
Salon's Steve Kornacki wrote that it was tempting to cheer for Weiner's theatrics, "until you realize that all he's doing is pursuing a very shrewd media strategy designed to position himself for future advancement."
Kornacki contrasted Weiner's rant on the 9/11 "heroes" against his silence on the Islamic community center near ground zero that opponents derided as the "ground zero mosque."
Kornacki also pointed out that even though the real workhorses behind the 9/11 bill were fellow Democratic Reps. Carolyn Maloney and Jerrold Nadler, Weiner's rant got most of the attention.
Errol Louis, a CNN contributor who hosts a television and radio show in New York and is a former New York Daily News columnist, said that's why Weiner's fellow Democrats aren't rushing to his defense.
"We have not heard from any of them," Louis said. "And there was always this underlying problem where Anthony Weiner was considered a show horse rather than a work horse. We see him on cable TV all the time, but that's not really where a lot of work gets done in the district. There are a lot of meetings. There's a lot of hard work that gets done.
"So, there's a certain amount of satisfaction from some of his colleagues, frankly, saying like, 'Look, the guy got what was coming to him.' "
Weiner has vowed that he won't resign, and said he hoped to save his marriage to Huma Abedin, a longtime aide to Hillary Clinton in the White House, Senate and now in the State Department.
Weiner has fully embraced social media sites such as Twitter and Facebook -- and used the platforms to unleash his comedic take on life and politics.
In a June 1 tweet on his profile @RepWeiner, he wrote: On with Rachel (Maddow) tonight. Gonna talk about Trump eating pizza with a fork! #DudeYoureANewYorker!
Or his May 27 tweet saying "my tivo ate the hockey game! #WhoCanISue?"
Weiner graduated from the State University of New York Plattsburgh and worked as an aide to Schumer from 1985 to 1991. A year later he served on the New York City Council.
New York Magazine's James Burnett once wrote that Weiner "quickly distinguished himself at City Hall, partly because he was known to cruise around the building on rollerblades, and partly because he was so eager to orchestrate face-offs with the mayor (Rudy Giuliani)."
Throughout his time in office, Weiner has found himself drawn back to the city he calls home. He ran unsuccessfully in the Democratic mayoral primary race in 2005 and was mentioned as a candidate for 2013. But most observers now feel the scandal has ruined any chance of that.
"He was arguably the front runner. He'd raised more money than anybody else," Louis said. "That is completely out of reach now because the mayor of New York City now runs the school system for about the last nine years or so, and people, you know, parents are not going to look away at something like this."
Weiner's congressional career now faces an uncertain future, with an ethics investigation in the works and calls for him to resign. But Weiner said he'll let his constituents decide on whether he should return for an eighth term. And their opinions are mixed on whether they want him to remain in office.
"It's scary that, you know, a political person that we elected would be able to do something like that," said Ally Nekta, a voter in the 9th District.
"He should resign," said fellow voter Berta Nektalov.
Patrick Riley, meanwhile, stood by him. "Actually, I'm glad he's not resigning. What he does on his personal time is his business."
The CNN Wire contributed to this report.