Marco Rubio and Ted Cruz continue to fight over the undecided Republican voters across Iowa and even New Hampshire four weeks before voting is set to begin.

According to a report from Fox News, the Cuban-American presidential candidates are both angling to capture the support of the voters in both areas.

A Bloomberg Politics/Des Moines Register poll in December announced that only 33 percent of caucus-goers in Iowa had definitely decided on a candidate, and two-thirds are still open to be persuaded. A nationwide poll by Quinnipiac University also confirmed this, finding that nearly 6 out of 10 Republicans could still change their minds before their vote.

Both Cruz and Rubio, 45 and 44 respectively, have established a presence in Iowa, especially the former who secured the support of a number of the most influential candidates in the area, including Rep. Steve King. He has also launched the "Cruzin' to Caucus" bus tour that visited various local businesses and town halls across the state.

Rubio has also held a town-hall-style meeting in Cedar Rapids as well as a bus tour and meet-and-greet events. Although the young senator impressed, a lot of the people are still undecided about their final choice for the most important seat in the country.

Retired 74-year-old Connie Peterson attended one of Rubio's events in Marshalltown and revealed he's still thinking of his vote saying, "I've seen Marco Rubio and Ted Cruz. In many ways they seem similar, and I can't make up my mind there."

She added, "It's going to be a hard decision."

Plenty of voters share the sentiment, including Lary Clark who said the both of the candidates are geared to win the Latino cut of the pie.

"I want somebody who's going to be able to win the general election," Clark explained during an event of Cruz's.

Battling for important votes, the Cuban-American have not shied away from criticizing their opponents in various occasions. The report revealed Rubio has blasted his rival's "commitment to national security", and Cruz has dubbed Rubio as an "establishment favorite" supporting amnesty for illegal immigrants.

Recently, Cruz's communication director Rick Tyler tweeted an article from a New York Magazine's women's blog named The Cut. The titled was entitled "A Vote for Marco Rubio Is a Vote for Men's High-Heeled Booties", and compared a pair of stylish black boots of Rubio to the kind of footwear of One Direction band member Harry Styles, according to a report from Politico.