Liz Halloran

Picking Wisconsin Rep. Paul Ryan as his running mate has helped GOP presidential candidate Mitt Romney in the Badger State, but just a little, a new poll suggests.

Obama leads Romney among likely voters in Wisconsin, 49 percent to 46 percent, according to a Marquette Law School poll released Wednesday afternoon. The poll was conducted Aug. 16 through 19, following Ryan's selection as Romney's running mate on Aug. 11.

GOP officials and the Mitt Romney campaign have cut a deal with Texas Rep. Ron Paul's campaign to allow some — though not all — of Paul's delegates from Louisiana and Massachusetts to be seated at the Republican National Convention. The status of Maine's delegates remains unsettled.

The compromise would appear to avert a potential public clash with Paul supporters during the convention's opening day Monday.

The question of whether GOP vice presidential pick Rep. Paul Ryan of Wisconsin will ultimately help or hurt Mitt Romney's quest for the White House is the subject of fierce debate.

But some politicos are calling Ryan a kingmaker following former longtime Wisconsin Gov. Tommy Thompson's slim victory Tuesday in the hotly contested, four-way Republican U.S Senate primary.

Why? Ryan gave Thompson a shout-out at a Badger State homecoming rally Sunday, and the former governor quickly incorporated the veep pick's endorsement-of-sorts into a campaign ad.

Who Is He?

Joe Biden: Biden, whose own presidential aspirations sputtered in 1988 and again in 2008, brought to the Democratic ticket foreign policy chops and an ability to relate to working-class voters. In his 36 years representing Delaware in the U.S. Senate, he became known as more pragmatist than ideologue. He has also made a somewhat dubious name for himself because of his volubility and not infrequent verbal stumbles. But he has parlayed those potential liabilities into an effective, if occasionally unpredictable, campaign trail presence.

Republican presidential candidate Mitt Romney discarded his increasingly inert better-safe-than-sorry campaign strategy Saturday when he named budget hawk and Democratic bete noire Rep. Paul Ryan of Wisconsin as his running mate.

Republican presidential candidate Mitt Romney continued Tuesday to push back on calls to release more years of tax returns and defended keeping investments in offshore accounts — both issues that have been dogging his run for the White House.

As the presidential campaigns continue to ramp up their attacks (see: felon, liar, outsourcing), the candidates are homing in this week on the country's electoral fertile crescent.