Will Republicans Take Control of the Senate in This Year's Election?

Recently, there have been debates in whether Republicans will take control of the Senate in this year's senate elections. Each day it appears that a republican takeover of the Senate is more and more likely. Some polls on the other hand say that the odds of Republicans taking over the Senate aren't as high as some people would expect and that Democrats will still have a slight majority in the Senate. According to some, it will be a close call on whether Republicans will take control of the Senate. If Republicans do take control of the Senate, massive change in inedible. Obama may be thrown out of office, Obama care could be repealed and new laws could be made. However if there ends up being a tie for the amount of seats in the Senate, Joe Biden would split the tie and most likely vote on the democrat's side.  This year's elections could decide the makeup of the US Senate and Congress itself. I am posting this event because I am personally curious about how my fellow classmates will react to these predictions and I am also curious about what they think will happen in this year's Senate elections and what the makeup of congress will be after the elections.

Here are some articles about this year's Senate elections:
Republican takeover of Senate appears more and more assured

Will the 2014 Election be a Wave or a Ripple?

Battle For The Senate

Here are some questions for debate:
Will Republicans take control of the Senate in this year's Senate Elections?
If Republicans don't take control of the Senate this year then what will the results be?