A Democrat emphasizing the importance of federal government spending faces a Republican who has taken a pledge to abandon earmarks.
The candidate had pulled out of a planned Sunday debate on "Meet the Press" to be with his ailing father.
Delaware GOP Senate contender Christine O’Donnell said her team has to "check all the bushes and check all the cars" each night.
Colorado Senate candidate Ken Buck (R) has added his voice to the chorus of Republicans calling for gubernatorial candidate Dan Maes to step aside.
"After having a lengthy conversation with Dan Maes, it is clear to me that Dan is struggling to determine the best path for his campaign, his family and for Colorado," Buck said in a statement. "I have decided that I can no longer support his candidacy for governor of Colorado."
Buck joins former Sen. Hank Brown (R-Colo.), former GOP Senate candidate Pete Coors and former state Senate President John Andrews (R), who have all called for Maes to step aside.
Florida Senate candidate was scheduled to face off against Democrat Kendrick Meek Sunday on "Meet the Press."
The Illinois Senate race is tied with less than two months to go before Election Day.
A new Chicago Tribune/WGN-TV poll had Democrat Alexi Giannoulias and Rep. Mark Kirk (R-Ill.) both getting 34 percent in the statewide survey of 600 likely voters. The poll, which was conducted Aug. 28-Sept. 1., also found there was 22 percent undecided.
One troubling sign for Democrats: Kirk led Giannoulias 34 percent to 23 with independents. But Giannoulias had an advantage over Kirk among African-American voters, 58 percent to 3, with 26 percent undecided.
The National Republican Senatorial Committee recently pledged $3.4 million to bolster Kirk's campaign. Senate Majority Whip Dick Durbin (D-Ill.) said the Democrats won't make a similar committement to Giannoulias.
Obama campaigned and raised money for Sestak's opponent, Sen. Arlen Specter, in the race for the Democratic nod.
Christine O’Donnell gets Tea Party support in the hopes she can defeat Mike Castle in the GOP Senate primary.
Vice President Joe Biden will head to Missouri to headline a fundraiser for Secretary of State Robin Carnahan's (D) Senate campaign. The Carnahan campaign confirmed the event will take place, but there's no word yet on exactly when.
Carnahan, who is locked in a tight race with Rep. Roy Blunt (R-Mo.), already received some fundraising help from the White House in July, when President Obama headlined two events for Carnahan's campaign.
Blunt outraised Carnahan in the second quarter of the year, hauling in $2.2 million to Carnahan's $1.5 million. Blunt ended the quarter with $4.5 million cash on hand to Carnahan's $3.6 million.
Blunt has worked to tie Carnahan to the president, and used the July event against Carnahan in an earlier attack ad. The president's approval ratings in Missouri are below the 50 percent mark.
The Carnahan campaign, meanwhile, is working to label Blunt as corrupt, calling the congressman the "very worst of Washington" in an attack ad released earlier this week.
Outside groups are also spending on the race. The conservative group American Crossroads GPS launched an ad Thursday hitting Carnahan on healthcare.
-Updated at 5:56 p.m.