House Democrats are determined to cast an election-year spotlight on Republican opposition to raising the minimum wage and overhauling immigration laws.

To try to accomplish that in the GOP-controlled House, Democrats are planning to rely on an infrequently used, rarely successful tactic known as a “discharge petition.”

It requires the minority party — the Democrats — to persuade about two dozen Republicans to defy their leadership, join the Democrats and force a vote on setting the federal minimum wage at $10.10 an hour.

House Minority Leader Nancy Pelosi of California said Democrats will push the wage issue when Congress returns from its break Feb. 24. Forcing a vote on a comprehensive overhaul of immigration laws could occur in a few months.

Democratic leaders argue that a majority of Americans favor both steps, which are priorities for President Barack Obama, and say the House GOP is the obstacle. Republicans say Democrats are embarking on an approach that they know has little chance of success in an attempt to circumvent the will of the GOP-led House.

The odds are daunting for Democrats in what clearly is political maneuvering ahead of the elections this fall.

Some questions and answers on how it works:

Q: What does a discharge petition do?

A: It allows the minority or opposition party to bypass the House speaker and get a vote.

First, 217 members — one more than half the House’s current membership — have to sign a petition. A motion to consider the wage issue would then be placed on the legislative calendar, but it can’t be acted on for at least seven days. Any lawmaker can then call it up but only on the second or fourth Monday of the month. The motion is debated and, if the House passes it, lawmakers would then consider and vote on the bill.

Currently there are 232 Republicans, 200 Democrats and three vacancies in the House. All 200 Democrats would have to sign the petition, but Democrats would have a tough time getting 17 Republicans to join them.

Signing a discharge petition would be a breach of loyalty for Republicans, certain to draw the wrath of the caucus, and a rebuke of Speaker John Boehner, R-Ohio.

Republicans largely oppose any increase in the minimum wage. They say it’s an issue left to the states and that it could slow hiring in a struggling economy.

Q: What about immigration? A number of House Republicans back a comprehensive approach. Would they sign a discharge petition?

A: Highly unlikely. Republicans still are unwilling to break ranks with the party and Boehner, despite the distinctly different political forces on the issue.

Immigration overhaul has the support of an unusual coalition that includes some traditional backers of the GOP. They include the U.S. Chamber of Commerce and business groups, religious organizations such as the U.S. Catholic Bishops, evangelicals, and labor unions.

A few Republicans have expressed support for a comprehensive bill similar to the Senate-passed measure and have pleaded for the House to act this year. They worry about the political implications in their swing districts back home. Yet it would be a remarkable step for some of the more moderate lawmakers from California and Florida to abandon Boehner.

Boehner has come out with principles on immigration that call for legal status for some of the 11 million immigrants living in the country illegally and has expressed support for a piecemeal approach to the issue. Last week, however, the speaker all but ruled out the House acting on legislation this year, blaming GOP distrust of Obama to enforce any new law.

On the notion of a discharge petition, Boehner spokesman Michael Steel said, “This scheme has zero chance of success. A clear majority in the House understands that the massive Senate-passed bill is deeply flawed.”

Sen. Chuck Schumer, a major player on the bipartisan Senate measure, recently pushed the idea of a discharge petition, but the New York Democrat is unlikely to sway the nearly two dozen House Republicans necessary to sign on.

Q: A discharge petition sounds like a tough sell. Has it worked recently?

A: The discharge petition worked in 1986, forcing a vote on a gun rights bill, and in 2002, ensuring a vote on campaign finance legislation.

The difficulty for a discharge petition in the current political climate was never more evident than last fall in the midst of the 16-day partial government shutdown. Even though several Republicans said they wanted to vote on a spending bill with no strings attached, they rejected the idea that they would join forces with the Democrats.