Voting is underway in the second round of elections to the Senate, which will replace one third of the 81 members of Parliament’s upper house. In each constituency voters are choosing between the two candidates who gained the highest number of votes in the first round of elections held last week. Radek Sušil an independent candidate running for the opposition Social Democrats in the district of Karviná, north Moravia, was the only candidate to secure a seat in the first round, winning over 53 percent of the vote. Overall, the opposition Social Democrats had a strong lead in the first round of the elections with all but one of their candidates progressing to the second round. The ruling Civic Democrats have 20 candidates in the running. The second round of the Senate elections, which will conclude on Saturday, might see the ruling Civic Democrats lose their narrow majority in the Czech Parliament’s upper house.